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Operating State And Fault Table
Cooling & Heatpump (Universal Board)
Phase Sequencer
LED_P
LED_R
LED_S
LED_T
(Red)
(Yellow)
(Yellow)
(Yellow)
Normal Operation
On
-
-
-
Reverse Phase
Blink
Blink
Blink
Blink
S & T Phase Missing
Blink
-
Blink
Blink
T Phase Missing
Blink
-
-
Blink
S Phase Missing
Blink
-
Blink
-
R Phase Missing
-
-
-
-
Overload
Blink
-
-
-
Sensor Missing
Blink
On
On
On
Notes: 1. “-” means LED off.
2. When R phase missing, no LED or buzzer will indicate the error, but relay 71 (Common) and 81
(NO) will cut off.
3. The unit will check the discharge sensor availability only during power up.
4.
All errors can only recover through
manually reset
.
ERROR CODE AT 7 SEGMENT DISPLAY
OPERATION / FAULTY INDICATION
E1 BLINKING
ROOM SENSOR CONTACT LOOSE/SHORT
E2 BLINKING
INDOOR COIL SENSOR CONTACT LOOSE/SHORT
E3 BLINKING
OUTDOOR COIL SENSOR CONTACT LOOSE/SHORT
E4 BLINKING
COMPRESSOR OVERLOAD
E5 BLINKING
GAS LEAK
E6 BLINKING
N/A
HEAT LED BLINKING
OUTDOOR DEFROST (FOR HEATPUMP ONLY)