Check and save the data of
operating condition.
Check the conditions
whether it occurs
immediately after the
power on or during
operation or stopping.
(It will be convenient to
persuade the customer why
an improvement of power
supply is required by
showing these data)
Propose an improvement to
the customer.
Restart operation and check
it, as much as possible,
under the operating
conditions for 30 minutes
before error occurred.
Replace outdoor control
PCB.
Wait and see without taking
any action.
2. Error detection method
By Checking the power supply
voltage at input side of the
outdoor control PCB
3
.
Condition of error displayed
When the voltage between L1-N
and L2-N become 0V and/or
the current of L3 decrease ( 0
Ampere )
4. Presumable cause
• Faulty power supply at
primary side
• Anomalous outdoor control
PCB
Note: