Carrier 53KHET 12 - Heat Pump System Malfunctions

55
SELF DIAGNOSTIC FUNCTION FOR MALFUNCTIONS DETECTION (Cont.)
For Sizes : 12K / 18K / 24K ( Heat Pump )
Indoor Unit Display Panel
HEAT PUMP SYSTEM
Hi Wall Split Systems
53QHET12-708F
53QHET18-708F
Hi Wall Split Systems
53QHET24-708F
Malfunction
Reason
OPERATION
Led
TIMER
Led
Malfunction
Reason
OPERATION
Led
TIMER
Led
DEFROST
Led
AUTO
Led
Return Air Sensor
( open or short circuit )
Return Air Sensor
( open or short circuit )
X X X
Indoor Coil Sensor
( open or short circuit )
Indoor Coil Sensor
( open or short circuit )
X X X
Indoor Fan Motor has
been out of control for
over 1 minute
X
Outdoor Coil Sensor
( open or short circuit )
X X X
Compressor Overload
cuts out 4 times
X
Compressor Overload
cuts out 4 times
X
Electronic Control PCB
( EEPROM error )
Electronic Control PCB
( EEPROM defect )
X X
No over – zero signal
Indoor / Outdoor units
Communication error
X X X
Refrigerant leak
Outdoor unit protection
works
X X
Leds Status Refers To Malfunction Reason
X = OFF
= ON
= Flash at 5Hz
= Flash continuously
Refrigerant leak
X X
Leds Status Refers To Malfunction Reason
X = OFF
= ON
= Flash at 5Hz
= Flash continuously
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 connect the electrical main supply by moving the circuit breaker to ON position
2-2 operate the air conditioner by using the wireless remote control.