Carrier 53KHET 12 Installation Manual page 57

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