5
2 Indoor unit and outdoor unit communication protection error diagnosis and solution (E1)
Error Code
E1
Malfunction decision
conditions
Indoor unit does not receive the feedback from outdoor unit during 110
seconds and this condition happens four times continuously.
Supposed causes
●
Wiring mistake
●
Indoor or outdoor PCB faulty
Measure Vs, is it positive fluctuation?
(Vs is the voltage between S and N of
outdoor unit. Red pan-S, Black pan-N)
Measure Vs, is it positive fluctuation?
(Vs is the voltage between S and N of
outdoor unit. Red pan-S, Black pan-N)
Yes
Power off, then restart the unit 2 minutes later
Power off, then restart the unit 2 minutes later
No
Replace the outdoor main PCB.
Power on. Is the error
extinguished?
Replace the outdoor main PCB.
Power on. Is the error
extinguished?
Check the outdoor wiring connection
Check the outdoor wiring connection
Replace the indoor main PCB.
Power on. Is the error
extinguished?
Replace the indoor main PCB.
Power on. Is the error
extinguished?
Yes
Replace the outdoor main PCB.
Replace the outdoor main PCB.
No
Replace the indoor main PCB.
Replace the indoor main PCB.
No
Check the indoor wiring connection
Check the indoor wiring connection
Yes
Yes
Check whether reactor
is normal?
Check whether reactor
is normal?
Yes
Replace the reactor
Replace the reactor
No
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 ...