Troubleshooting
SiUS041829E
106
Part 6 Service Diagnosis
Reference
Reference
4.23 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
Check No.19
A
B
C
°C
°F
°C
°F
°C
°F
09/12 class
82
179.6
65
149
70
158
18 class
90
194
64
147.2
81
177.8
Caution
WARNING
To cool the electrical components,
the o
u
tdoor fan starts when the
radiation fin temperat
u
re rises
above
C
and stops when the radiation
fin temperat
u
re drops below
B
.
(R22998)
YES
NO
YES
NG
NO
OK
NO
YES
T
u
rn off the power. Then, t
u
rn on
the power to restart the system.
Check the radiation fin
temperat
u
re.
Radiation fin dirty?
Check No. 19
Check the o
u
tdoor fan.
Error again or
o
u
tdoor fan activated?
Replace the o
u
tdoor
u
nit
PCB (main PCB).
Clean
u
p the radiation fin.
Be s
u
re to t
u
rn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
Replace the o
u
tdoor fan
motor.
Correct the connectors
and fan motor lead wire.
Replace the o
u
tdoor
u
nit
PCB (main PCB).
Above
A
?
Check the installation
condition.
Go to
Check No. 17
.
Summary of Contents for RX09RMVJU9
Page 17: ...SiUS041829E Part 2 Specifications 13 1 Specifications 14 Part 2 Specifications ...
Page 125: ...SiUS041829E Check Part 6 Service Diagnosis 121 18 class R25105 1 2 3 4 Multimeter ...
Page 127: ...SiUS041829E Check Part 6 Service Diagnosis 123 18 class R20704 W V U DC_P1 DC_N1 ...
Page 143: ...SiUS041829E Operation Limit Part 8 Appendix 139 4 Operation Limit RX09 12 18RMVJU9 3D092209E ...
