A1-01" - Pcb Abnormality; A5-00" - Freeze-Up Protection / Heating Peak Cut Control - Daikin FTXJ-M Service Manual

ESIE16-02K | Part 2. Troubleshooting
2.2.1.3. "A1-01" – PCB abnormality
Trigger
The system cannot set the internal set-
tings
Possible cause
Wrong models interconnected
Faulty wiring.
Faulty or disturbance of the power supply
(imbalance > 10%). Power drop. Short cir-
cuit.
Faulty indoor PCB.
2.2.1.4. "A5-00" – Freeze-up protection / Heating peak cut control
Trigger
• during cooling operation, indoor heat
exchanger temperature is below 0°C
(freeze-up protection control).
• during heating operation, indoor heat
exchanger is above 65°C (heating
peak-cut control).
Possible cause
Air short-circuit.
Clogged air filter.
Dust accumulation on indoor heat
exchanger.
Faulty indoor heat exchanger thermistor.
Faulty indoor PCB.
Page 22
RA R32 Split & multi split M-Series
Effect
Unit will stop operating.
Check
Check if unit combination is official.
Refer to 'Combination database'.
Check the connection of all terminals by
disconnecting and reconnecting all termi-
nals.
Check if the power supply is conform with
regulations. No fluctuations in frequency.
Check if error still occurs after turning off
power and turning it back on again.
Check if the indoor PCB receives power.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check the wiring to indoor PCB.
Effect
Unit will stop operating.
Check
Check if the airflow around the unit is OK
and there are no obstructions.
Check if the air filter is clogged.
Check if indoor heat exchanger is
dirty/dusty.
Check indoor heat exchanger thermistor.
Check if error still occurs after turning off
power and turning it back on again.
Check if the indoor PCB receives power.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check the wiring to indoor PCB.
2.2. Error based troubleshooting
Reset
Power reset via outdoor unit.
Corrective action
Install compatible models.
Replace wire harness/terminal when con-
nection is not OK.
Adjust power supply when required.
Power reset via outdoor unit.
Adjust power to the indoor PCB.
Replace indoor PCB when HAP LED is
not blinking in regular intervals.
Install correct spare part or update indoor
PCB.
Adjust wiring to indoor PCB when
required.
Reset
Automatic reset when temperature is
within range.
Corrective action
Remove obstruction.
Clean the air filter.
Clean the indoor heat exchanger.
Replace indoor heat exchanger thermistor
when required.
Adjust power to the indoor PCB.
Replace indoor PCB when HAP LED is
not blinking in regular intervals.
Install correct spare part or update indoor
PCB.
Adjust wiring to indoor PCB when
required.
31/05/21 | Version 1.1