Service manual

119
18
Trial Operation
Procedure and Summary of Trial Operation
Start
Set the operation mode to
COOL by pushing the operation
switch for 5 seconds or more,
and then check “L” is displayed.
Is the operation current
within ±15% of the catalogue
current value?
(Max. Hz operation)
Normal
Check operation status of the compressor.
Check louver direction.
Check the supply power voltage.
Check power cable dia.
Check overload of indoor /outdoor
temperature.
Check pipe length and refrigerant amount.
Check the compressor operation Hz, and
outdoor fan operation status.
Is there an abnormal sound of the
compressor?
No
Yes
Is temp. difference of
suction/discharge air good?
No
Yes
Is the supply voltage
good (220V 240V)?
No
Yes
Is the operation pressure
normal?
No
Yes
(NOTE 1)
(NOTE 2)
(NOTE 3)
This air conditioner is attached
with reactivation delay timer, so
the operation restarts
2 minutes 30 seconds after it
stopped.
]
[
(3) Cooling operation check
Is there cool air discharge?
No
Yes
Is air circulation good?
Operate all the units
concurrently.
No
Yes
Check each
indoor unit
consecutively.
Trial operation from
outdoor unit is
also available.