L4-00 - Inverter Radiation Fin Overheat - Daikin Sky Air Advance RZA200D7Y1B Service Manual

2.4.19 L4-00 – Inverter radiation fin overheat
RZA200+250D7Y1B
Sky Air Advance-series
ESIE19-13A – 2020.05
Possible cause: Faulty outdoor unit fan motor.
7 Check if the power supply is conform with the regulations. See
4
circuit" [ 135].
Possible cause:
▪ Faulty or disturbance of the power supply (imbalance >10%),
▪ Power drop,
▪ Short circuit.
INFORMATION
If all procedures listed above have been performed and the problem is still present,
contact the helpdesk.
Trigger
Thermistor located inside
the power module of the
inverter PCB for
compressor detects a
temperature higher than
a certain value.
To solve the error code
INFORMATION
It is recommended to perform the checks in the listed order.
Prerequisite: Stop the unit operation via the user interface.
1 Turn OFF the respective circuit breaker.
DANGER: RISK OF ELECTROCUTION
Confirm the rectifier voltage is below 10 V DC before proceeding, see
rectifier voltage" [
2 Check that the thermal interface grease is applied properly on the (PCB or
refrigerant piping) contact surface of the heat sink. Adjust if needed.
Possible cause: Thermal interface grease NOT applied properly on the heat
sink.
3 Check if heat sink plate is correctly fixed with screws.
Possible cause: Heat sink plate not correctly installed.
4 Check (by touching) if refrigerant is flowing through the radiant cooling
refrigerant circuit. The radiant cooling refrigerant circuit should be warm if
refrigerant is flowing. If no refrigerant flow, perform a check of the liquid
cooling expansion valve, see
Possible cause: No refrigerant flow through the radiant cooling refrigerant
circuit.
5 Perform a check of the liquid cooling expansion valve. See
4
valve" [ 68].
Possible cause: Faulty liquid cooling expansion valve.
Effect
Unit will stop operating.
4 135].
"3.4 Expansion valve" [
2 Troubleshooting
|
"4.1 Electrical
Reset
Manual reset via remote
controller.
Outdoor unit power reset.
"To check the
4
68].
"3.4 Expansion
Service manual
31