Troubleshooting by Error Code
SiAF341904E
242
Part 6 Service Diagnosis
5.37 Momentary Power Failure during Test Operation
Applicable
Models
All outdoor unit models
Error Code
L2
Method of Error
Detection
Momentary power failure is detected by the PCB.
Error Decision
Conditions
Judgment is made by AC power frequency detection circuit on the outdoor unit main PCB
Supposed
Causes
Defective wiring
Defective outdoor unit main PCB
Troubleshooting
Error
rec
u
rs after
t
u
rning OFF the po
w
er
and O
N
again.
Any
disconnection
of connectors, loose
contact or
w
iring disconnection
in the transmission
w
irings to
the o
u
tdoor
u
nit main
PCB?
N
O
YES
YES
N
O
Temporary pro
b
lem
Correct any fa
u
lt.
Replace the o
u
tdoor
u
nit
main PCB (A1P).
Caution
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.
