L4" Indoor Unit: Malfunction Of Inverter Radiating Fin Temperature Rise (R8T) - Daikin ERSQ 011AAV1 Service Manual

Troubleshooting by Indication on the Remote Controller
3.39 "L4 " Indoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise (R8T)
L4
Remote Control
Display
Subcode 8
Applicable
All indoor units
Models
Method of Fin temperature is detected by the thermistor of the radiation fin.
If fin temperature is too high, the compressor will slow down (capacity shortage).
Malfunction
Detection
Malfunction
Faulty thermistor.
Decision Broken wire.
Conditions
Supposed
Causes
Troubleshooting
178
Defect of inverter PC board [A4P (1
Defect of fin thermistor (R8T)
Be sure to turn off power switch before connecting or disconnecting connector,
otherwise parts may be damaged.
Caution
The radiator
fin temperature is
supposed to have risen
to high value.
NO
Is the
connector X111A
of the fin thermistor properly
connected to the indoor
PC board?
YES
Turn ON the power supply, and then
press the remote control check
button once.
Does the
malfunction code "L4-08"
recur when the unit starts
operation?
NO
ø ø
) or A5P (3 )]
YES
NO
YES
ESIE09-08
Faulty heat radiation of power unit
• Air suction or discharge opening
blocked
• Dirty radiator fin
• High water / discharge temperature
• Check heat conductive paste
Properly connect.
Replace the inverter PC board
assy ø ø
[A4P (1 ) or A5P (3 )] as well.
Continue operation.
Troubleshooting