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17
19. SELF DIAGNOSTIC FUNCTION FOR MALFUNCTION DETECTION
EXPLAINATION OF SELF-DIAGNOSTIC FUNCTION
•
Self-diagnostic function is the key for success of air conditioner operation.
•
The printed circuit boards existing inside the indoor unit are equipped with self-diagnostic function
to detect malfunction and automatically stops the operation at the air conditioner.
•
Once a malfunction is detected, the diagnostic control section will force the system mode to OFF
for 3 minutes. After the OFF delay, system mode releases and allowed returning to its normal state.
The system will be allowed to restart on its own.
•
The diagnostic control section will allow the system to fail 5 consecutive times before shutting
down the system.
•
If the system is performing an active defrost, both the compressor drive and reversing valve
malfunction test will be cancelled and reinitiated after the following compressor OFF-ON cycle.
•
The Unit on lamp is scanned every half-second and the error codes are displayed by the flashing
frequency of unit on lamp. The error codes are displayed during SHUT-OFF (3 minutes off and after
the 5th retry failure).
Indoor Units 42VMC Series
Malfunction
Reason
Flashing
Frequency
Allowed
Mode
Return Air Sensor
3
Fan Only
Indoor Coil Sensor
4
Fan Only
Compressor Drive
9
Fan Only
Electronic Control PCB (EEPROM)
10
Fan Only
Notes :
1- Prior to the malfunction repair, disconnect the electrical mains supply by moving the circuit
breaker to OFF position.
2- After repairing the malfunction:
2-1 Press Reset button (5)
2-2 connect the electrical main supply by moving the circuit breaker to ON position
2-3 operate the air conditioner by using the wireless remote control.
1
5
1 : Green led flashes
if there is a malfunction
5 : Reset Button
Summary of Contents for 38QG15-H
Page 8: ...6 8 WIRING DIAGRAMS...
Page 9: ...7 WIRING DIAGRAMS Cont...
Page 11: ...9 11 REFRIGERATION CYCLE 53VMC SERIES HEAT PUMP SYSTEM...
Page 12: ...10 REFRIGERATION CYCLE 53VMC SERIES Cont COOL ONLY SYSTEM...
Page 29: ...6 8 WIRING DIAGRAMS...
Page 30: ...7 WIRING DIAGRAMS Cont...
Page 32: ...9 10 REFRIGERATION CYCLE 53VMC SERIES HEAT PUMP SYSTEM...
Page 33: ...10 REFRIGERATION CYCLE 53VMC SERIES Cont COOL ONLY SYSTEM...