14
11 High temperature protection of compressor top diagnosis and solution (P2)
Error Code
P2
Malfunction decision
conditions
If the sampling voltage is not 5V, the LED will display the failure.
Supposed causes
●
Power supply problems.
●
System leakage or block
●
PCB faulty
Check the air flow system
of indoor and outdoor units
Clear up the air inlet and outlet or the heat
exchanger of indoor and outdoor units.
Yes
No
Yes
Yes
Power off, then restart the unit 10
minutes later
Check if the temperature
of compressor
No
Check refrigerant system
Yes
Check the overload
protector
Correct the connection.
No
Measure the resistance
between the two ports of
the OLP. Is it zero?
Yes
Replace the OLP.
No
Replace the outdoor control PCB.
Yes
Содержание 38QUS012DS
Страница 1: ...SERVICE MANUAL 12 18 24K LIGHT COMMERCIAL ...
Страница 5: ...2 PRODUCT LINEUP ...
Страница 6: ...3 UNIT MODEL INDENTIFICATION ...
Страница 7: ...PART 1 GENERAL INFORMATION 1 1 DUCT ...
Страница 9: ...2 INSTALLTION SPACE ...
Страница 10: ...3 STATIC PRESSURE ...
Страница 11: ...4 STATIC PRESSURE 42QSM012DS ...
Страница 12: ...5 STATIC PRESSURE 42QSM018DS ...
Страница 13: ...6 STATIC PRESSURE 42QSM024DS ...
Страница 18: ...11 5 Screw off the fixing screws to remove the evaporator 1 screw ...
Страница 19: ...PART 1 GENERAL INFORMATION 1 2 CASEETTE ...
Страница 22: ...3 INSTALLTION SPACE ...
Страница 29: ...PART 1 GENERAL INFORMATION 1 3 UNDER CEILING ...
Страница 31: ...3 INSTALLTION SPACE ...
Страница 37: ...PART 1 GENERAL INFORMATION 1 4 OUTDOOR UNIT ...
Страница 38: ...2 DIMENSIONS Model W D H W1 A B 38QUS012 18DS 810 310 558 874 549 325 38QUS024DS 845 320 700 908 560 335 ...
Страница 44: ...8 compressor on bottom plate 4 Lift the compressor from the base pan assembly ...
Страница 45: ...PART 2 ELECTRICAL DIAGRAM ...
Страница 46: ...1 WIRING DIAGRAM 42QSM012 18 24DS ...
Страница 47: ...2 WIRING DIAGRAM 42QTD012 18DS ...
Страница 48: ...3 WIRING DIAGRAM 42QTD024DS ...
Страница 49: ...4 WIRING DIAGRAM 42QZL018 24DS ...
Страница 50: ...5 WIRING DIAGRAM 38QUS012DS ...
Страница 51: ...6 WIRING DIAGRAM 38QUS018DS ...
Страница 52: ...7 WIRING DIAGRAM 38QUS024DS ...
Страница 53: ...PART 3 TROUBLE SHOOTING ...