Carrier 42KCR009713 - Troubleshooting

Service manual
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9. Troubleshooting
10.1 Display board
 Operation
The indicator flashes once every second after power is on and illuminates when the air conditioner is in
operation.
 Timer indicator:
The indicator illuminates then TIMER is set ON.
 PRE-DEF. indicator (For cooling & heating mode only)
The air conditioner starts defrosting automatically if outdoor unit frosts in heating operating.
At this time, PRE-DEF. indicator illuminates.
 Auto indicator:
This indicator flashes when the air conditioner is in AUTO operation.
10.2 Troubleshooting
Failure phenomenon
Operation
lamp
Timer
lamp
Indoor fan speed has been out of control for over 1 minute
☆
X
Indoor room temp. or evaporator sensor is open circuit or short circuit
☆
On
Over current protection of the compressor occurs 4 times X
☆
EEROM error On
☆
No over-zero signal
☆ ☆
r Extinguish
☆ Flash at 5Hz