Troubleshooting
SiBE811001EB
223
CONVENI-PACK
8.4.40 Inverter PCB Abnormality
Error Code
L1
Applicable
Models
LRYEQ16AY1
Method of Error
Detection
Error is detected based on the current value during waveform output before starting
compressor.
Error is detected based on the value from current sensor during synchronous operation when
starting the unit.
Error Decision
Conditions
Overcurrent (OCP) flows during waveform output
Defective current sensor during synchronous operation
IPM failure
Supposed
Causes
Compressor inverter PCB (A4P) or fan inverter PCB (A5P or A9P)
z
IPM failure
z
Current sensor failure
z
Drive circuit failure
Troubleshooting
Refer to P.291.
Turn OFF the power supply once,
and then turn ON the power supply
again.
Does the power supply
normally restart?
Check if the power
transistor is
normal.
Check if the power
transistor of the
fan driver is
normal.
Check if insulation
resistance of the
compressor is 100k
Ω
or
more.
CHECK 4
CHECK 4
NO
YES
Replace the compressor
inverter PCB (A4P).
NO
Replace the compressor and
compressor inverter PCB (A4P)
at the same time.
NO
It is supposed that the error
results from external causes
other than failures (e.g.
exogenous noises or thunder).
YES
Replace the compressor
inverter PCB (A4P) and fan
inverter PCB (A5P or A9P).
NO
YES
Replace the compressor inverter
PCB (A4P).
YES
Caution
Be sure to turn off the power switch before connecting or disconnecting connectors, or parts may be damaged.
CHECK 4