SiUS071735EA
Troubleshooting
Service Diagnosis
96
4.26 Electrical Box Temperature Rise
Error Code
L3
Method of Error
Detection
An electrical box temperature rise is detected by checking the radiation fin thermistor with the
compressor off.
Error Decision
Conditions
With the compressor off, the radiation fin temperature is above
A
.
The error is cleared when the radiation fin temperature drops below
B
.
To cool the electrical components, the outdoor fan starts when the radiation fin temperature
rises above
C
and stops when the radiation fin temperature drops below
B
.
Supposed
Causes
Defective outdoor fan motor
Short circuit
Defective radiation fin thermistor
Disconnection of connector
Defective outdoor unit PCB
Troubleshooting
Check No.17
Refer to P.107
Check No.19
Refer to P.108
A
B
C
°C
°F
°C
°F
°C
°F
09/12 class
82
179.6
65
149
70
158
15/18/24 class
90
194
64
147.2
81
177.8
Caution
WARNING
To cool the electrical components,
the outdoor fan starts when the
radiation fin temperature rises
above
C
and stops when the radiation
fin temperature drops below
B
.
(R22998)
YES
NO
YES
NG
NO
OK
NO
YES
Turn off the power. Then, turn on
the power to restart the system.
Check the radiation fin
temperature.
Radiation fin dirty?
Check No. 19
Check the outdoor fan.
Error again or outdoor
fan activated?
Replace the outdoor unit
PCB (main PCB).
Clean up the radiation fin.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Replace the outdoor fan
motor.
Correct the connectors
and fan motor lead wire.
Replace the outdoor unit
PCB (main PCB).
Above
A
?
Check the installation
condition.
Go to
Check No. 17
.
Summary of Contents for FDMQ-R Series
Page 12: ...SiUS071735EA 1 List of Functions Part 1 List of Functions 1 Functions 2...
Page 14: ...SiUS071735EA 3 Specifications Part 2 Specifications 1 Specifications 4...
Page 120: ...Check SiUS071735EA 109 Service Diagnosis 15 18 24 class R25105 1 2 3 4 Multimeter...
Page 122: ...Check SiUS071735EA 111 Service Diagnosis 15 18 24 class R20704 W V U DC_P1 DC_N1...
Page 140: ...Piping Diagrams SiUS071735EA 129 Appendix RX24RMVJU A 3D092249A...
