Daitsu FDLA-09, Installation, Operation & Service Manual

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SK2019 FCSD(H)-V/P-ECM-001
LED Display and Error Description
Complete Function PCB – S Control Type
Fan speed setting LED Display Condition
High speed Red LED On Normal
Medium speed Yellow LED On Normal
Low speed Green LED On Normal
For all units - Green LED
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
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 70
ºC .
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 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 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 unit is standby,
Tr<2ºC. 1. Turn on unit to keep Tr higher
than 5ºC