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SK2016 HW-V-AECM-001
D.13.
LED Display and Error Description
For all units - Operation LED light (Green)
Error Description
Blink
Reason
Remedy
Electrical heater failure
Green LED blinks 1 times,
stops for 3s
Only for unit with EH.
EH safety switch is
open.
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 37.4ºF.
Check the water temperature.
Indoor coil over heat
protection
Green LED blinks 6 times,
stops for 3s
Water temperature is
higher than 158ºF.
Check the water temperature
EC motor failure
Green LED blinks 9 times,
stops for 3s
No EC motor feedback
1.
Check DIPB‐SW5 and SW6 setting.
2.
Check the EC motor.