Page 37 of 52
PG2021_SWC-V-ECM_02
Filter Switch (S6
PCB)
Green LED blinks 7
times, stops for 3s
Filter switch is
opened.
2. replace the new filter
Electric Heater
failure
Green LED blinks 8
times, stops for 3s
E8
Only for unit with
EH.
1. Change fan speed to high.
EH safety switch is
opened.
2. Replace the damaged EH safety
switch.
EC motor
failure(CN4)
Green LED blinks 9
times, stops 3s
E9
No EC motor
feedback
1. Check Modbus setting.
2. Check the EC motor.
EC motor
failure(CN5)
Green LED blinks 10
times, stops 3s
E10
No EC motor
feedback
1. Check Modbus setting.
2. Check the EC motor.
Anti-frozen
protection
Green LED blinks 12
times, stops for 3s
E12
When unit is
standby, Tr<2
ºC
.
1. Turn on unit to keep Tr high than 5ºC
Indoor coil sensor 3
failure (S6 PCB)
Green LED blinks 13
times, stops for 3s
E13
Ti3 sensor
unplugged or
damaged.
1. Check if Ti3 plug is connected or not.
2. Check if sensor’s resistance is correct
or not.
Indoor coil sensor 4
failure (S6 PCB)
Green LED blinks 14
times, stops for 3s
E14
Ti4 sensor
unplugged or
damaged.
1. Check if Ti4 plug is connected or not.
2. Check if sensor’s resistance is correct
or not.
PM2.5 sensor failure
(S6 PCB)
Green LED blinks 15
times, stops for 3s
E15
PM2.5 sensor
unplugged or
damaged.
1. Check if PM2.5 plug is connected or
not.
2. Check if sensor’s resistance is correct
or not.
AQI sensor failure
(S6 PCB)
Green LED blinks 16
times, stops for 3s
E16
AQI sensor
unplugged or
damaged.
1. Check if AQI plug is connected or not.
2. Check if sensor’s resistance is correct
or not.
Cooke Industries - Phone: +64 9 579 2185 Email: [email protected] Web: www.cookeindustries.co.nz