Electrical Box Temperature Rise - Daikin 2MKS40G2V1B Service Manual

Troubleshooting for Outdoor Unit

7.12 Electrical Box Temperature Rise

L3
Remote
Controller
Display
Method of An electrical box temperature rise is detected by checking the radiation fin thermistor with the
Malfunction compressor off.
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Troubleshooting
Check No.17
Turn off the power and turn it on
Refer to P.269
again.
Check No.19
Refer to P.270
249
With the compressor off, the radiation fin temperature is above A °C.
The error is cleared when the temperature drops below B °C.
To cool the electrical components, the outdoor fan starts when the radiation fin temperature
rises above C °C and stops when it drops below B °C.
A B C (°C)
(°C) (°C)
80 70
Defective outdoor unit fan
Short circuit
Defective fin thermistor
Disconnection of connector
Defective outdoor unit PCB
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Error again or outdoor
fan activated?
NO
Check No. 19
Check the outdoor fan or
related.
OK
Radiation fin dirty?
Slightly dirty
Check No. 17
Check the installation condition.
A B C (°C)
(°C) (°C)
80 70
75
To cool the electrical components,
the outdoor fan starts when the
radiation fin temperature rises
above
drops below
YES
Check the radiation fin
temperature.
A
Above
˚C?
YES
NG
Too dirty
75
SiBE12-816_D
WARNING
C
˚C and stops when it
B
˚C.
NO
Replace the outdoor unit
PCB.
Replace the fan motor.
Correct the connectors and
fan motor lead wire.
Replace the outdoor unit
PCB.
Clean up the radiation fin.
Service Diagnosis
(R14416)