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Troubleshooting for Outdoor Unit
SiBE12-816_D
249
Service Diagnosis
7.12 Electrical Box Temperature Rise
Remote
Controller
Display
L3
Method of
Malfunction
Detection
An electrical box temperature rise is detected by checking the radiation fin thermistor with the
compressor off.
Malfunction
Decision
Conditions
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.
Supposed
Causes
Defective outdoor unit fan
Short circuit
Defective fin thermistor
Disconnection of connector
Defective outdoor unit PCB
Troubleshooting
Check No.17
Refer to P.269
Check No.19
Refer to P.270
A
(°C)
B
(°C)
C
(°C)
80
70
75
Caution
WARNING
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.
(R14416)
YES
NO
Slightly dirty
NG
Too dirty
OK
NO
YES
Turn off the power and turn it on
again.
Check the radiation fin
temperature.
Check No. 17
Check the installation condition.
Radiation fin dirty?
Above
A
˚C?
Check No. 19
Check the outdoor fan or
related.
Error again or outdoor
fan activated?
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.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
A
(°C)
B
(°C)
C
(°C)
80
70
75