Carrier 12K Manual page 8

(Cont.)
Key Features
The electronic printed circuit board in the indoor unit is equipped with
smart self diagnostic function which automatically stops the operation of
Leds Status and Error Code on the display panel of indoor unit ( all sizes ) refer to
malfunction reason for easy fast service and maintenance.
Malfunction
Reason
Indoor air temperature sensor malfunction
Indoor coil temperature sensor malfunction
Outdoor coil temperature sensor
malfunction
Outdoor unit malfunction
EEPROM malfunction
Pump temperature sensor malfunction
( option )
Water-level alarm malfunction
Refrigerant leak
Leds status on the PCB of outdoor unit only sizes 36K – 42K – 48K and 60K ( 3Ph ) refers to malfunction reason
Protection function operates if a malfunction happens in the outdoor unit as below by leds of PCB of outdoor unit as follows:
Malfunction Reason
No defect
Phase reversal
Overload of current
Phase loss
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, connect the electrical main supply by moving the circuit breaker to ON position
and operate the air conditioner by using the wireless remote control or using wired room controller.
the air conditioner in case of a malfunction.
OPERATION
= Light
LED 1
off
on
off
on
LED LED
TIMER DEF/FAN
X
= Flash at 5Hz
LED 2
off
off
on
on
6
LED LED Malfunction
ALARM
X
= OFF
LED 3
on
on
on
on
Code
E2
E3
E4
E6
E7
E5
E8
EC