
OCH791 _44
4230 (U5): Heat sink temperature trouble
Abnormal points and detection methods
TH8 detects a temperature outside the specified range
during compressor operation.
TH8: Thermistor <Heat sink>
Causes and checkpoints
• Blocked outdoor fan
• Malfunction of outdoor fan motor
•
Blocked airflow path
• Rise of ambient temperature
• Characteristic defect of thermistor
• Malfunction of input circuit on outdoor power circuit
board
• Malfunction of outdoor fan driving circuit
Diagnosis of failure
Refer to the diagnosis of error code 5110.
Refer to the diagnosis of error code 4400.
Replace the thermistor
(Defective thermistor).
Replace the outdoor power circuit board
(Defective outdoor power circuit board).
Improve the airflow path.
Connect the wiring/connector properly.
Replace it in the case of breakage.
Check the wiring and connector connection of TH8.
Check the resistance of TH8.
Is error code 5110 displayed when
restarted?
Does the fan rotate during com
-
pressor operation?
Is there any obstacle which blocks
an airflow around the
heat sink?
Is there any abnormality such as
disconnection, looseness or break
-
age?
Is the resistance normal?
TH8 temp. - resistance characteristic
0°C [32°F]
180 kΩ
25°C [77°F]
50 kΩ
50°C [122°F]
17 kΩ
70°C [158°F]
8 kΩ
90°C [194°F]
4 kΩ
Yes
(air path blocked)
Yes
Yes
No
No
No
(no obstacle)
No
No
Yes
Yes
Содержание CITY MULTI PUMY-P200YKM3
Страница 20: ...OCH791 _20 6 OUTLINES AND DIMENSIONS Unit mm ...
Страница 21: ...OCH791 _21 7 WIRING DIAGRAM ...
Страница 103: ...OCH791 _103 Photo 16 Accumulator Inlet Outlet Photo 17 Accumulator Accumulator leg Accumulator leg fixing screws ...
Страница 106: ...OCH791 _106 11 ELECTRICAL WIRING Refer to installation manual 6 Electrical work for details ...