15
14. SELF DIAGNOSTIC FUNCTION
14-1 INTRODUCTION
- Self-diagnostic function is the key for success of heat pump system.
- The printed circuit boards existing inside the indoor unit are equipped with self-diagnostic function to detect
malfunction and automatically stops the operation at the air conditioner after blinking of power or timer led as per
malfunction.
14-2 SELF DIAGNOSTIC FUNCTION
The self-diagnostic function included in the control system detects malfunctions of the following
components:
(1) Return Air Sensor
(2) Indoor Coil Sensor
(3)
Outdoor Coil Sensor
(4) Compressor Drive
(5) Anti-overheat
(6) Low ambient
No.
Malfunction
Reason
Power
Led
Timer
Led
1 Return Air Sensor - Blinking
2 Indoor Coil Sensor - Blinking
3 Outdoor Coil Sensor - Blinking
4 Compressor Overload Blinking -
5 Anti-overheat Blinking -
6 Low ambient Blinking -
Power led or
Timer led
Blinkin
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