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22. SELF DIAGNOSTIC FUNCTION FOR MALFUNCTIONS DETECTION
EXPLAINATION OF SELF-DIAGNOSTIC FUNCTION
- Self-diagnostic function is the key for success of air conditioner operation.
- The printed circuit boards existing inside the indoor unit are equipped with self-diagnostic function
to detect malfunction and automatically stops the operation of the air conditioner.
- Once a malfunction is detected, the display panel of the indoor unit will shows the malfunction type
through the indicator leads of display panel.
Malfunction
Reason
LED 1
OPERATION
LED 2
TIMER
LED 3
DEF./FAN
LED 4
ALARM
Display
(Digital Tube)
Return Air Sensor
( open or short circuit )
E2
Indoor Coil Sensor
( open or short circuit )
E3
Outdoor Coil Sensor
(open or short circuit)
E4
Outdoor Unit Protection Works
E6
Electronic Control PCB
( EEPROM error )
E7
Water-level alarm malfunction
E8
= Flash at 5Hz
Protection function operates if a malfunction happens in the outdoor unit
as below by leds of PCB of outdoor unit as follows:
Defect
LED 1
LED 2
LED 3
No defect
off
off
on
Phase reversal
on
off
on
Overload of current
off
on
on
Phase loss
on
on
on
\
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:
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.
Summary of Contents for Cassette Sky 53QC 36
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