![background image](http://html1.mh-extra.com/html/daikin/ftxta30aw/ftxta30aw_service-manual_4214030038.webp)
ESIE17-19C
|
Part 2. Troubleshooting
2.2. Error based troubleshooting
Page 38
19/08/19
|
Version 1.1
Optimized Heating 4
2.2.2.21. “L4-00” – Inverter radiating fin temperature abnormality
More info:
2.2.2.22. “L5-00” – Inverter instantaneous overcurrent (AC output)
Trigger
Effect
Reset
Radiation fin temperature rise is detected.
Unit will stop operating.
Automatic reset.
Power reset via outdoor unit.
Possible cause
Check
Corrective action
Faulty outdoor fan motor.
Check the fan motor.
Check fan motor connections and wiring.
Replace fan motor when required.
Adjust wiring when required.
Faulty or disturbance of the power supply
(imbalance > 10%). Power drop. Short cir-
cuit.
Check if the power supply is conform with
regulations. No fluctuations in frequency.
Adjust power supply when required.
Power reset via outdoor unit.
Faulty radiating fin thermistor.
Check radiating fin thermistor.
Replace radiating fin thermistor when
required.
Faulty outdoor unit PCB in which radiating
fin thermistor is connected.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Check if the outdoor main PCB receives
power.
Restore the power to the outdoor main
PCB.
Replace outdoor main PCB when HAP
LED is not blinking in regular intervals.
Silicon grease is not applied properly on
the radiation fin.
Check the silicon grease on the outdoor
unit PCB.
Adjust silicon grease when required.
Check procedures
Replacing procedures
"Replacing DC fan motor assembly" on page 87
"Refrigerant thermistors" on page 60
"Replacing main PCB" on page 95
"Product specific information" on page 118
Trigger
Effect
Reset
An output overcurrent is detected by
checking the current that flows in the
inverter DC section.
Unit will stop operating.
Manual reset via user interface.
Possible cause
Check
Corrective action
Installation of the unit is not in line with
specifications.
Check the installation specifications.
Refer to the installation manual.
Adjust the installation when required.
Refrigerant shortage.
Check for refrigerant shortage. Refer to
the nameplate for the correct charge.
Charge the correct refrigerant amount
when required.
Humidity in refrigerant (ice formation in
expansion valve).
Check for humidity in the refrigerant.
In case of suspicion of humidity, recover,
vacuum and recharge with virgin refriger-
ant.
Non condensables in refrigerant.
Check for non condensables in refriger-
ant.
In case of suspicion of non condensables,
recover, vacuum and recharge with virgin
refrigerant.
Stop valve is closed.
Check stop valve.
Open stop valve when required.
Faulty power module = faulty outdoor
inverter PCB.
Check outdoor inverter PCB.
Check if the HAP LED is blinking in regu-
lar intervals.
Check if the correct spare part is installed.
Restore the power to the outdoor inverter
PCB.
Replace the outdoor inverter PCB when
required.