SiMX042215E
Troubleshooting
Part 6 Service Diagnosis
85
Reference
Reference
4.22 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
°C.
The error is cleared when the radiation fin 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 the radiation fin temperature drops below
B
°C.
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.96
Check No.19
Refer to P.97
A
(°C)
B
(°C)
C
(°C)
12 class
94
82
87
18 class
95.5
80
85
24 class
100
64
91
Caution
WARNING
To cool the electrical components,
the o
u
tdoor fan starts
w
hen the
radiation fin temperat
u
re rises
a
b
o
v
e
C
°C. The o
u
tdoor fan stops
w
hen the radiation fin temperat
u
re
drops
b
elo
w
B
°C.
(R21436)
YES
N
O
YES
N
G
N
O
OK
N
O
YES
T
u
rn off the po
w
er. Then, t
u
rn on
the po
w
er 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 acti
v
ated?
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 po
w
er s
w
itch
b
efore connecting or disconnecting
connectors, or parts may
b
e damaged.
Replace the o
u
tdoor fan
motor.
Correct the connectors
and fan motor lead
w
ire.
Replace the o
u
tdoor
u
nit
PCB (main PCB).
A
b
o
v
e
A
°C?
Check the installation
condition.
Go to
Check No. 17
.
