SERVICE MANUAL For LIGHT COMMERCIAL

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SERVICE MANUAL
For
LIGHT COMMERCIAL
(Version 1, 2014/6/1)
1
Cassette indoor unit
42TSV1181001231
42TSV1241001231
42TSV1361001231
18K
42TSV1361001931
42TSV2481001931
42TSV2601001931
24-60K
Under-ceiling indoor unit
42FTV1181001231
42FTV1241001231
42FTV1361001231
42FTV1361001931
42FTV2481001931
42FTV2601001931
Ducted indoor unit
42SMV1181001231
42SMV1241001231
42SMV1361001231
42SMV1361001931
42SMV2481001931
42SMV2601001931
2
Free standing indoor unit
42CFV2241001231
42CFV2481001931
42CFV2601001931
42CFH2481001931
42CFH2601001931
Universal outdoor unit
38VN1181123A
38VN1241123A
38VN2241123A
38VN1361123A
38VN1361193A
38VN2481193A
38VN2601193A
38HN2481193A
38HN2601193A
3
Contents
PART1
ELECTRICAL DIAGRAMS
…………………………………..
5
PART2
TROUBLE SHOOTING
………………………………….
14
4
PART – 1
ELECTRICAL DIAGRAMS
(The wiring diagrams may have been changed without notify, actual diagrams on the units shall prevail.)
5
IDU WIRING DIAGRAM - 42FTV118/124
42SMV124
IDU WIRING DIAGRAM –42FTV 136-231/ 136-931/248/260 42SMV118/136-231/
136-931/248/260
6
IDU WIRING DIAGRAM – 42TSV 18-60K
IDU WIRING DIAGRAM –42CFV224
7
IDU WIRING DIAGRAM –42CFV248/260
IDU WIRING DIAGRAM –42CFH248/260
8
ODU WIRING DIAGRAM - 38VN118/ 124
38VN2241123A
ODU WIRING DIAGRAM - 38VN1361123A
9
ODU WIRING DIAGRAM - 38VN1361193A
ODU WIRING DIAGRAM - 38VN248/260
10
ODU WIRING DIAGRAM - 38HN248/260
11
INTER DIAGRAM – 42TSV 18-60K 42SMV18-48K 42CFV224
INTER DIAGRAM –42FTV 18-60K 42SMV260
12
INTER DIAGRAM –42CFV248/260
13
PART – 2
TROUBLE SHOOTING
14
INDOOR UNITS
Display panel
TSV series
FTV series
SMV series
CFH & CFV series
15
Error code:
For TSV, FTV and SMV
NO.
1
2
3
4
5
6
7
8
9
Malfunction
Operation
lamp
Communication malfunction between
indoor unit and outdoor unit
Open or short circuit of T1 sensor
Open or short circuit of T2 sensor
Open or short circuit of T2B sensor
Indoor EEPROM malfunction
Indoor fan speed is out of control
Refrigerant leakage protection
Outdoor unit malfunction
Full-water malfunction
O (on) X(off)
Timer
lamp
Defrosting
lamp
Alarm lamp
Display
(digital tube)
☆
X
X
E1
X
X
X
X
☆
☆
◎
☆
E2
E3
E4
E7
E8
EC
Ed
EE
X
X
X
☆
X
X
☆
X
X
☆
X
X
☆
X
X
☆
O
X
☆
X
X
X
X
X
X
☆(flash at 5Hz) ◎(flash at 0.5Hz)
For Inverter Floor Standing
Codes
Contents
P0
Evaporator low temp. protection
Ed
Outdoor unit malfunction
E1
Communication malfunction between indoor unit and outdoor unit
E2
Open or short circuit of T1 temperature sensor
E3
Open or short circuit of T2 temperature sensor
E4
Open or short circuit of T2B temperature sensor
E7
Indoor EEPROM malfunction
E8
Indoor fan speed is out of control
For Fixed Speed Floor Standing (Some error codes are for outdoor unit)
Codes
Contents
P4
Protection of temperature of indoor evaporator
P5
Protection of temperature of outdoor condenser
P7
Compressor discharge temperature protection
P9
Protection of anti-cold wind
P10
Discharge pressure protection
P11
Suction pressure protection
P12
Current overload protection
E1
Open- or short-circuit of T1 temperature sensor
E2
Open- or short-circuit of T2 temperature sensor
E3
Open- or short-circuit of T3 temperature sensor
E4
Open- or short-circuit of T4 temperature sensor
E5
Communication malfunction between indoor unit and outdoor unit
E10
Suction pressure failure of compressor
E13
Default phase of compressor
E14
Phase sequence error of compressor
E15
Indoor fan speed is out of control
EC
Refrigerant leakage protection
16
T1: Indoor room temperature
T2: Coil temperature of indoor heat exchanger middle
T2B: Coil temperature of indoor heat exchanger outlet
T3: Coil temperature of condenser
T4: Outdoor ambient temperature
T5: Compressor discharge temperature
Note: Please take out the bridges to short-circuit the corresponding sockets when replacing indoor board.
17
Trouble Shooting
Communication error between indoor and outdoor units
Power off, then turn on the unit 5
seconds later(reconnect the
power wire).Is the error still
displaying after several minutes?
Yes
Check if there’s any interference.
Such as too many lamps, power
transformers? Or the signal wire is
too long?
Yes
Remove interference.
Increase the capacity of antiinterference
No
Adopt shield cable/Shield
cable earthing.
No
Correct the connection.
Yes
Replace the signal wire.
No
Pull out and insert back.
No
Check whether the signal wire is
shield cable or whether the shield
cable is earthing?
Yes
Check whether the wire is correct
polarity? P to P, Q to Q, E to E?
Yes
Check whether the signal wire is
broken?
No
Check whether the signal wires
insert on main PCB well?
Yes
Replace indoor m a i n PCB, is the
error distinguished?
No
Replace the outdoor main PCB.
18
Open or short circuit of temperature sensor
Check the connections
between temperature
sensor and PCB. Are
the connections good?
No
Correct the connections.
Yes
Check the resistance value
of the sensor via Appendix 1
Is it normal?
Yes
Replace indoor or outdoor PCB.
No
Replace the sensor
Indoor EEPROM malfunction
Shut off the power supply and
turn it on 5 seconds later. Is it
still displaying the error code?
Yes
If the EEPROM chip
is welded on PCB,
replace the PCB
directly. Otherwise,
check whether the
EEPROM chip
plugged in PCB well?
No
Insert the EEPROM well
Yes
Replace the indoor PCB.
19
Indoor fan Speed is out of control. (Only for the units used DC motor)
Shut off the power supply
and turn it on 5 seconds
later. Is it still displaying
the error code?
No
The unit operates normally.
Yes
Shut off the power supply,
rotate the fan by hand.
Does it rotate properly?
No
Find out the cause and
have it solved. For
example, check
whether the fan is
blocked or the bearing
is broken?
No
Correct the connections.
Yes
Check the wires of fan
motor. Are all the
connections good?
Yes
Check whether the fan
motor is normal through
index 1?
No
Replace the fan
motor
No
Yes
Check whether the main PCB is
normal through index 2?
No
Replace the
main PCB.
The
malfunction is
solved?
Yes
Note: Index 1 and index 2 are in Appendix 5.
20
If the
malfunction is
still existing,
replace the
main PCB
Refrigerant leakage protection:
Shut off the power supply and
turn it on 5 seconds later. Is it
still displaying the error code?
Yes
Is there cool air blowing
out from indoor air outlet?
Yes
Check if T2 sensor is well
fixed. Correct the installation
or replace T2 sensor. Does
the problem remain again?
No
Yes
Is there any leakage? Especially
the connection parts, such as the
gas valve and the liquid valve.
No
Replace indoor PCB.
Yes
Repair the leakage and
recharge the refrigerant.
Is there any block i n g ? (Such as the
capillary or the welded points of the pipes.)
Yes
Clear the blocking.
21
Outdoor unit malfunction
Outdoor unit malfunction
Whether the outdoor
main board has error
display
Yes
Refer to corresponding solving steps
No
Check whether the power is on
No
Connect the wiring well or
replace the communication wire
No
Whether the outdoor
unit is power on
Yes
Check whether the
communication wire
between the indoor and
outdoor unit is
connected correctly
Yes
Replace outdoor main
board
check if the errors
happen again?
No
Yes
Replace the indoor PCB
Trouble is solved
22
Full-water malfunction
If the water-level switch
is inserted well?
No
Insert the water-level switch well
Yes
Replace the water-level switch
Yes
If the water-level switch
is broken?
No
If the water pump is
normal?
No
Replace the water pump
Yes
Check PCB board or replace the indoor main PCB
Default phase of compressor
23
Phase sequence error of compressor:
Phase sequence error
Change the order of the wires to power supply.
Switch on the unit again.
If the problem can not be solved, the outdoor PCB is defective
24
OUTDOOR UNITS
Error code
(Not available for fixed Speed Floor Standing)
Display Code
E0
E2
E3
E4
E5
E6
P0
P1
P2
P3
P4
P5
P6
P7
Malfunction or Protection
Outdoor EEPROM malfunction
Communication malfunction between indoor and outdoor units
Communication malfunction between IPM board and outdoor main board
Open or short circuit of T3 or T4 temperature sensor
Voltage protection of compressor
PFC module protection (Specific for models with PFC board)
Top temperature protection of compressor
High pressure protection (Models specific)
Low pressure protection (Models specific)
Current protection of compressor
Discharge temperature protection of compressor
High temperature protection of condenser
IPM module protection
High temperature protection of evaporator
T1: Indoor room temperature
T2: Coil temperature of indoor heat exchanger middle
T2B: Coil temperature of indoor heat exchanger outlet
T3: Coil temperature of condenser
T4: Outdoor ambient temperature
T5: Compressor discharge temperature
25
Outdoor EEPROM malfunction
E0 display
Outdoor EEPROM malfunction
Yes
If the EEPROM chip
is welded on PCB,
replace the PCB
directly. Otherwise,
check whether the
EEPROM chip
plugged in PCB well?
No
Insert the EEPROM well
Yes
Replace the outdoor main board
E2 malfunction: same as “E1” in indoor unit.
26
Communication malfunction between IPM board and outdoor main board
E3 display
Communication malfunction between
IPM board and outdoor main board
Is there at least one LED in
the IPM board light?
No
Check the signal wire between
the IPM module and the main
board, is it connected good?
Yes
No
Yes
Reconnect and retry. Is
error still display?
No
No
Replace IPM board, and
then check whether the
system can run normally
Yes
No
Replace outdoor main
board, and then check
whether the system can run
normally
Yes
No
Replace the electric control
box
Trouble is solved
27
Open or short circuit of T3 or T4 temperature sensor
E4 display
Judge 1: Outdoor condenser temp. sensor (T3) is malfunction
Check whether the wiring of the
condenser temp. sensor(T3) is
broken off
Yes
Connect the wiring well
No
Check whether the resistance of
condenser temp. sensorT3) is
wrong refer to the Appendix 1
Yes
Replace condenser temp. sensor(T3)
No
Judge 2: Outdoor ambient temp. sensor (T4) is malfunction
Check whether the wiring of the
outdoor ambient temperature
sensor (T4) is broken off
Yes
Connect the wiring well
No
Check whether the resistance of
outdoor ambient temperature
sensor (T4) is wrong refer to the
Appendix 1
Yes
No
Replace outdoor main PCB
28
Replace outdoor ambient
temperature sensor (T4)
Voltage protection of compressor:
Check
Check whether
whether the
the power
power
voltage
voltage is
is normal.
normal.
No
Restart
Restart the
the unit
unit when
when the
the power
power
supply
supply gets
gets normal
normal
Yes
Measure
Measure whether
whether outdoor
outdoor
terminal
terminal voltage
voltage is
is normal?
normal?
No
Check
Check the
the wiring
wiring of
of
power
power wires
wires well
well or
or
correctly
correctly
Reconnect
Reconnect itit well
well
No
Check
Check the
the wiring
wiring of
of
LL and
and N
N well
well or
or
correctly
correctly
Reconnect
Reconnect itit well
well
Yes
Measure
Measure whether
whether the
the voltage
voltage
between
between LL and
and N
N is
is normal?
normal?
Yes
Measure
Measure whether
whether input
input voltage
voltage
of
of bridge
bridge rectifier
rectifier is
is normal
normal
refer
refer to
to the
the Appendix
Appendix 3?
3?
No
Check
Check the
the wiring
wiring of
of
bridge
bridge rectifier
rectifier well
well
or
or correctly
correctly
Reconnect
Reconnect itit well
well
Yes
Measure
Measure whether
whether the
the voltage
voltage
between
between P
P and
and N
N is
is normal?
normal?
No
Check
Check whether
whether
bridge
bridge rectifier
rectifier is
is
normal
normal
Replace
Replace the
the bridge
bridge
rectifier
rectifier
No
Yes
Replace
Replace the
the PFC
PFC module(If
module(If has)
has)
No
Yes
Check
Check the
the wiring
wiring of
of
reactor
reactor or
or inductance
inductance
No
Reconnect
Reconnect the
the
wiring
wiring
Yes
Replace
Replace the
the IPM
IPM board,
board, IfIf the
the IPM
IPM board
board
and
and main
main board
board is
is in
in aa board,
board, replace
replace the
the
outdoor
outdoor main
main PCB
PCB
Yes
Check
Check whether
whether reactor
reactor
or
or inductance
inductance is
is normal
normal
29
No
Replace
Replace reactor
reactor or
or
inductance
inductance
PFC module protection (Available for single phase models with PFC board)
E6 display
PFC module protection
Check whether the connecting line between
main board and the PFC module is connected
tightly
No
Connect it tightly, check normal or not
No
Yes
Check whether the voltage
between P and N of IPM module is
380-390V
Yes
Replace the outdoor main board
No
Replace the PFC module
30
Top temperature protection of compressor:
P0 display
Temperature protection of
compressor top
Whether compressor
operates?
Yes
No
Whether the connection is
good?
No
Reconnect and retest.
Yes
Whether refrigerant
circulation volume is
normal?
Whether protector is normal? If
protector is normal,resistance = 0
No
Charge refrigerant
Yes
Replace the outdoor main PCB
Whether abnormality is the
same after gas charging?
No
Check refrigerant system
(such as clogging of capillary
etc.)
31
No
Replace the protector.
High pressure protection (Models specific):
P1 display
High pressure protection
Judge 1: Whether the wiring
between the high pressure
switch and main control
board is connected well or
correctly
No
Connect it well
Yes
Judge 2: Whether
the high pressure
protector is broken
Method: Short connect the
high pressure protector
socket, check whether the
system can run normally
Yes
Replace high pressure protector
Yes
Stop the unit
No
Check whether
the refrigerant
system is ok
Judge 3: Check whether the
outdoor ambient
temperature is higher than
50℃
No
Judge 4: Check whether the
outdoor unit is bad
ventilation
Yes
Make the outdoor unit ventilate well
No
Judge 5: Check whether the
heat exchanger is dirty
Judge 6: Check whether the
refrigerant pipe is blocked
Yes
Yes
Clean the heat exchanger
Let the refrigerant out, then use the
high pressure nitrogen or refrigerant to
blow pipe, vacuumize and charge the
refrigerant again
Replace outdoor main board
32
Low pressure protection (Models specific):
P2 display
Low pressure protection
Judge 1: Whether the
wiring between the low
pressure protector and main
control board is connected
well or correctly
No
Connect it well
Yes
Judge 2: Whether
the low pressure
protector is broken
Method: Short connect the
low pressure protector
socket, check whether the
system can run normally
Yes
Replace low pressure protector
Yes
Stop the unit
No
Check whether
the refrigerant
system is ok
Judge 3: Check whether the
outdoor ambient
temperature is too low
No
Judge 4: The
refrigerant of the
system is leakage
Method: Connect the pressure
gauge to the gauge joint of the
system, check whether the
pressure is lower than
0.14MPa
Yes
Leak hunting: Charge nitrogen or refrigerant
to the system, if the leakage is serious, there
will be distinct gas leakage “cici” sound; if the
leakage is slight, use the suds (mixture of
water and abluent is also ok if it can make
bubble) or electronic leak detector.
Yes
Let the refrigerant out, then use the high
pressure nitrogen or refrigerant to blow pipe,
vacuumize and charge the refrigerant again
No
Judge 5: The refrigerant
pipe is blocked
No
Replace outdoor main board
33
Current protection of compressor:
P3 display
Current protection of compressor
Judge 1: Check whether the
input current of the power
supply wire is more than
20A (For 36K & 48K with 1
phase, it is 30A)
Yes
Check whether
the refrigerant
system is ok
Judge 2: Check whether the
outdoor ambient
temperature is higher than
50℃
Yes
Stop the unit
No
Judge 3: Check whether the
outdoor unit is bad ventilation
Yes
Make the outdoor unit ventilate well
No
Judge 4: Check whether the
heat exchanger is dirty
Yes
Clean the heat exchanger
No
Judge 5: The refrigerant
pipe is blocked
Yes
Let the refrigerant out, then use the high
pressure nitrogen or refrigerant to blow pipe,
vacuumize and charge the refrigerant again
No
Replace outdoor main
board,and check whether
the system can run normally
Yes
No
Replace the electric control box
Yes
Trouble is solved
34
Discharge temperature protection of compressor:
When compressor discharge temperature is higher than 115°C, the unit will stop, and unit runs again when compressor
discharge temperature is lower than 90°C.
P4 display
Temperature protection of
compressor discharge
Check whether the
compressor discharge temp.
is more than 115°C ?
Check whether the
refrigerant is leak
Yes
Yes
Stop leaking and add refrigerant
No
Check whether the wiring
connection is right between
compressor discharge temp.
sensor and PCB according
to wiring diagrams?
No
Correct the wiring connection
Yes
Judge: The
discharge temp.
sensor is broken
Method: Check whether the
resistance of compressor
discharge temp. sensor is
right refer to the Appendix 2
No
Replace the compressor discharge temp. sensor
Yes
Replace outdoor main board
Trouble is solved
35
High temperature protection of condenser:
When condenser high temperature is more than 65°C, the unit will stop, and unit runs again when outdoor pipe
temperature less than 52°C.
P5 display
High temperature protection of
condenser
Replace the temperature sensor
No
Check whether the
condenser temperature is
more than 65°C
No
Check whether the
resistance of condenser
temp. sensor is correct
refer to the Appendix 1
Yes
Replace outdoor main board
Yes
Judge 1: Check whether the
outdoor ambient
temperature is higher than
50℃
Yes
Stop the unit
No
Judge 2: Check whether the
heat exchanger is dirty
Yes
Clean the heat exchanger
No
No
Judge 3: The refrigerant
pipe is blocked
Yes
Let the refrigerant out, then use the high
pressure nitrogen or refrigerant to blow pipe,
vacuumize and charge the refrigerant again
36
IPM module protection (For single phase units)
At first test the resistance between every two ports of U, V, W of IPM and P, N. If any result of them is 0 or close to 0, the
IPM is defective. Otherwise, please follow the procedure below:
P6 display
IPM module protection
Check whether the voltage
range of P-N on IPM module is
normal? DC277-356V for 18K/
24K/30KBtu/h; DC277-410V for
36K/48KBtu/h
Check whether the
input power supply is
correct? 220-240V, 1N,
50Hz
No
Regulate it to correct,
then check whether the
system can work
normally?
No
Yes
No
Yes
Check whether the
connecting line between main
board and the IPM module is
connected tightly
No
Connect it tightly,
check ok or not?
Check whether the
power supply line is
connected correctly
and tightly
Connect it correctly
and tightly, check ok
or not?
No
Yes
No
Check whether the
connecting line of the
compressor is connected
correctly or tightly
No
Yes
Connect it well,
check ok or not?
No
Check whether the
lines in E-part box are
connected tightly
No
Connect it tightly,
check ok or not?
Yes
No
Yes
Replace the IPM module,
check whether the system
can work normally?
No
Check whether the bridge rectifiers
are normal? Use the multimeter to
measure the resistance between
each two terminals, check whether
there is the condition that value of
resistance is 0
No
No
Yes
Replace the main board;
check whether the system
can work normally?
Yes
Yes
Replace the bridge rectifiers
Check whether the connecting line of
every reactor is normal? If the line is
broken, the resistance of the two ports
is ∞(for 18K/24K/30KBtu/h);Check
whether the PFC module broken(for
36K/48KBtu/h)
No
No
Replace the compressor,
check whether the system
can work normally?
Yes
Yes
Replace the connecting line or
reactor or replace the PFC
module
Trouble is solved
37
IPM module protection (For three phases units)
P6 display
IPM module protection
Check whether the voltage
range of P-N on IPM module is
normal? DC 350-650V
Check whether the
input power supply is
correct? 380-415V, 3N,
50Hz
No
Regulate it to correct,
then check whether the
system can work
normally?
No
Yes
No
Yes
Check whether the
connecting line between main
board and the IPM module is
connected tightly
No
Connect it tightly,
check ok or not?
Check whether the
power supply line is
connected correctly
and tightly
Connect it correctly
and tightly, check ok
or not?
No
Yes
No
Check whether the
connecting line of the
compressor is connected
correctly or tightly
No
Yes
Connect it well,
check ok or not?
No
Check whether the
lines in E-part box are
connected tightly
No
Connect it tightly,
check ok or not?
Yes
No
Yes
Replace the IPM module,
check whether the system
can work normally?
No
Check whether the bridge rectifiers
are normal? Use the multimeter to
measure the resistance between
each two terminals, check whether
there is the condition that value of
resistance is 0
No
No
Yes
Replace the main board;
check whether the system
can work normally?
Yes
Yes
Replace the bridge rectifiers
Check whether the 3300µF/400V
electrolytic capacitor is normal?
No
Replace the compressor,
check whether the system
can work normally?
No
Replace this electrolytic
capacitor
Yes
Trouble is solved
Yes
38
High temperature protection of evaporator:
P7 display
High temperature protection of
evaporator
Whether compressor
operates?
No
Whether the
connection is
good?
Yes
Yes
Check whether the heat
exchanger is dirty, the airoutlet is blocked and the
indoor fan is running
normal?
Check the
resistance value of
the sensor via
Appendix 1,Is it
normal?
No
Reconnect and retest
No
Replace the temperature sensor
No
Clean the heat exchanger and
the air-outlet
Yes
Whether the indoor
PCB is normal?
Check whether the
indoor fan is running
normal
No
Check refrigerant system
(such as clogging of
capillary etc.)
39
No
Replace the indoor PCB
APPENDIX 1
℃
-20
-19
-18
-17
-16
-15
-14
-13
-12
-11
-10
-9
-8
-7
-6
-5
-4
-3
-2
-1
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
K Ohm
115.266
108.146
101.517
96.3423
89.5865
84.2190
79.3110
74.5360
70.1698
66.0898
62.2756
58.7079
56.3694
52.2438
49.3161
46.5725
44.0000
41.5878
39.8239
37.1988
35.2024
33.3269
31.5635
29.9058
28.3459
26.8778
25.4954
24.1932
22.5662
21.8094
20.7184
19.6891
18.7177
17.8005
16.9341
16.1156
15.3418
14.6181
13.9180
13.2631
Temperature Sensor Resistance Value Table, B=4100K
K Ohm
K Ohm
℃
℃
20
12.6431
60
2.35774
21
12.0561
61
2.27249
22
11.5000
62
2.19073
23
10.9731
63
2.11241
24
10.4736
64
2.03732
25
10.000
65
1.96532
26
9.55074
66
1.89627
27
9.12445
67
1.83003
28
8.71983
68
1.76647
29
8.33566
69
1.70547
30
7.97078
70
1.64691
31
7.62411
71
1.59068
32
7.29464
72
1.53668
33
6.98142
73
1.48481
34
6.68355
74
1.43498
35
6.40021
75
1.38703
36
6.13059
76
1.34105
37
5.87359
77
1.29078
38
5.62961
78
1.25423
39
5.39689
79
1.21330
40
5.17519
80
1.17393
41
4.96392
81
1.13604
42
4.76253
82
1.09958
43
4.57050
83
1.06448
44
4.38736
84
1.03069
45
4.21263
85
0.99815
46
4.04589
86
0.96681
47
3.88673
87
0.93662
48
3.73476
88
0.90753
49
3.58962
89
0.87950
50
3.45097
90
0.85248
51
3.31847
91
0.82643
52
3.19183
92
0.80132
53
3.07075
93
0.77709
54
2.95896
94
0.75373
55
2.84421
95
0.73119
56
2.73823
96
0.70944
57
2.63682
97
0.68844
58
2.53973
98
0.66818
59
2.44677
99
0.64862
40
℃
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
K Ohm
0.62973
0.61148
0.59386
0.57683
0.56038
0.54448
0.52912
0.51426
0.49989
0.48600
0.47256
0.45957
0.44699
0.43482
0.42304
0.41164
0.40060
0.38991
0.37956
0.36954
0.35982
0.35042
0.3413
0.33246
0.32390
0.31559
0.30754
0.29974
0.29216
0.28482
0.27770
0.27078
0.26408
0.25757
0.25125
0.24512
0.23916
0.23338
0.22776
0.22231
APPENDIX 2
℃
Compressor Discharge Temperature Sensor Resistance Value Table, B=3950K
K Ohm
K Ohm
K Ohm
℃
℃
℃
K Ohm
-20
542.7
20
68.66
60
13.59
100
3.702
-19
511.9
21
65.62
61
13.11
101
3.595
-18
483
22
62.73
62
12.65
102
3.492
-17
455.9
23
59.98
63
12.21
103
3.392
-16
430.5
24
57.37
64
11.79
104
3.296
-15
406.7
25
54.89
65
11.38
105
3.203
-14
384.3
26
52.53
66
10.99
106
3.113
-13
363.3
27
50.28
67
10.61
107
3.025
-12
343.6
28
48.14
68
10.25
108
2.941
-11
325.1
29
46.11
69
9.902
109
2.86
-10
307.7
30
44.17
70
9.569
110
2.781
-9
291.3
31
42.33
71
9.248
111
2.704
-8
275.9
32
40.57
72
8.94
112
2.63
-7
261.4
33
38.89
73
8.643
113
2.559
-6
247.8
34
37.3
74
8.358
114
2.489
-5
234.9
35
35.78
75
8.084
115
2.422
-4
222.8
36
34.32
76
7.82
116
2.357
-3
211.4
37
32.94
77
7.566
117
2.294
-2
200.7
38
31.62
78
7.321
118
2.233
-1
190.5
39
30.36
79
7.086
119
2.174
0
180.9
40
29.15
80
6.859
120
2.117
1
171.9
41
28
81
6.641
121
2.061
2
163.3
42
26.9
82
6.43
122
2.007
3
155.2
43
25.86
83
6.228
123
1.955
4
147.6
44
24.85
84
6.033
124
1.905
5
140.4
45
23.89
85
5.844
125
1.856
6
133.5
46
22.89
86
5.663
126
1.808
7
127.1
47
22.1
87
5.488
127
1.762
8
121
48
21.26
88
5.32
128
1.717
9
115.2
49
20.46
89
5.157
129
1.674
10
109.8
50
19.69
90
5
130
1.632
11
104.6
51
18.96
91
4.849
12
99.69
52
18.26
92
4.703
13
95.05
53
17.58
93
4.562
14
90.66
54
16.94
94
4.426
15
86.49
55
16.32
95
4.294
16
82.54
56
15.73
96
4.167
17
78.79
57
15.16
97
4.045
18
75.24
58
14.62
98
3.927
19
71.86
59
14.09
99
3.812
41
APPENDIX 3
Compressor checking
Measure the resistance value of each winding by using the tester.
Position
Compressor
Blue - Red
Blue - Black
Red - Blue
Resistance Value
DA130M1C-31FZ
DA250S2C-30MT
TNB306FPNMC-L
LNB42FSAMC
1.77Ω
(20℃)
0.55Ω
(20℃)
1.02Ω
(20℃)
0.53Ω
(20℃)
42
APPENDIX 4
IPM continuity checking
【Caution】Discharge the large capacity electrolytic capacitors completely before checking.
Disconnect all wires of IPM board, and use a digital tester to measure the resistance as below.
Normal resistance
value
Digital tester
(+)Red
(-)Black
N
P
U
V
Normal resistance
value
Digital tester
(+)Red
(-)Black
U
∞
(Several MΩ)
V
W
W
43
N
∞
(Several MΩ)
APPENDIX 5
Index 1: DC fan motor checking (control chip is outside of fan motor)
NO.
1
2
3
4
5
Color
Orange
Grey
White
Pink
Black
Signal
Hu
Hv
Hw
Vcc
GND
Color
Red
Blue
Yellow
Signal
W
V
U
Step1: Release the UVW connector. Measure the resistance of U-V, U-W, V-W. If the resistance is not equal to each other,
the fan motor must have problems and need to be replaced. Otherwise, go to step 2.
Step2: Power on and when the unit is in standby, measure the voltage of pin4-5 in feedback signal connector. If the value is
not 5V, change the PCB. Otherwise, go to step 3.
Step3: Rotate the fan by hand, measure the voltage between pin1-5, pin 2-5 and pin 3-5 in feedback signal connector. If
any voltage is not positive voltage fluctuation, the fan motor must have problems and need to be replaced.
44
APPENDIX 5
Index 2: DC fan motor checking (control chip is inside of fan motor)
Step1: Disconnect the motor from PCB, measure the resistance value of each winding by using the tester.
If any resistance value is zero, the fan motor must have problems and need to be replaced.
Step2: Connect the motor to the PCB, power on and measure the voltage of pin1-pin3, pin4-pin3 in fan motor connector
when the unit is in standby.
If the value of the voltage is not in the range showing in below table, the PCB must have problems and need to be
replaced.
DC motor voltage input and output
NO.
1
Color
Red
Signal
DC Voltage
Vs/Vm
140V~380V(WZDK124-38G,WZDK180-38G)
100V~380V(WZDK85-38G)
192V~380V(WZDK72-38G)
2
---
---
---
3
Black
GND
0V
4
White
Vcc
13.5-16.5V
5
Yellow
Vsp
0~6.5V
6
Blue
FG
15V
45

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