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SK2018 CHV2-V/P-ECM-001
LED Display and Error Description
LED receiver in ABS housing with 0.5m
(SGS14HFCA-01010101)
or 1.8m
(SGS14HFCA-01010102)
pre-wiring
Complete Function PCB - S Control Type
Fan speed setting
LED indication
Condition
High speed
Red LED On
Normal
Medial speed
Yellow LED On
Normal
Low speed
Green LED On
Normal
For all units - Green LED
Error Description
Blink
Reason
Remedy
Electric heater failure
Green LED blinks 1 times,
stops for 3s
Only for unit with EH.
EH safety switch is
opened.
1.
Change fan speed to high.
2.
Replace the damaged EH
safety switch.
Indoor coil sensor 2 failure
Green LED blinks 2 times,
stops for 3s
Ti2 sensor unplugged or
damaged.
1.
Check if Ti2 plug is
connected or not.
2.
Check if sensor’s resistance
is correct or not.
Return air sensor failure
Green LED blinks 3 times,
stops for 3s
Room sensor unplugged
or damaged.
1.
Check if Tr plug is
connected or not.
2.
Check if sensor’s resistance
is correct or not.
Indoor coil sensor 1 failure
Green LED blinks 4 times,
stops for 3s
Ti1 sensor unplugged or
damaged.
1.
Check if Ti1 plug is
connected or not.
2.
Check if sensor’s resistance
is correct or not.
Indoor coil low
temperature protection
Green LED blinks 5 times,
stops for 3s
Water temperature is
lower than 3 ºC.
Check the water temperature.
Indoor coil over heat
protection
Green LED blinks 6 times,
stops for 3s
Water temperature is
higher than 70ºC.
Check the water temperature
Water pump failure
Green LED blinks 7 times,
stops for 3s
Float switch is opened.
1.
Check if the condensate
water pipe is connected or
not.
2.
Check if the pump is
functioning or not.
EC motor failure (CN4)
Green LED blinks 9 times,
stops for 3s
No EC motor feedback.
1.
Check DIPB-SW5 and SW6
setting.
2.
Check the EC motor.
EC motor failure (CN5)
Green LED blinks 10 times,
stops for 3s
No EC motor feedback.
1.
Check DIPB-SW5 and SW6
setting.
2.
Check the EC motor.
Anti-frozen protection
Green LED blinks 11 times,
stops for 3s
When the unit is
standby, Tr<2ºC.
Turn on unit to keep Tr
higher than 5ºC.