Carrier 38 KCL018R33 - 10 Troubleshooting; Display Board

Service manual
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10.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