Is the
temperature differnce
between inlet and outlet air
10-30degC at
heating?
Check the indoor unit fan operation.
Check the temperature differnce between
inlet and outlet air.
Does the
heat load increase
after installtion?
“ WAIT ”
message is displayed (for 3 seconds) when
performing cooling, defrosting and heating
operations from the remote
controller.
Is the compressor
rotation speed low?
Are the
temperature conditions
of room and ambient air close to
close to the rated
conditions?
Mistake in model selection.
Calculate heat load once again.
The unit is operating normally but is
operating under the contol for
protecting compressor or other
respective parts.
NO
YES
YES
NO
YES
YES
YES
NO
NO
Is compressor
operating?
NO
YES
NO
Note (1) Ambient: 7°C, Room: 20°CDB
(1)
It is normal.
(This unit is designed to
start in the soft start mode
by detecting the compressor
under dome temperature
when it restart after power
reset.
It is necessary to replace to
higher capacity one or to
install additional unit.
Compressor refrigerant oil
protection control at starting
is activated. For the contents
of control, refer to the
compressor start control
Compressor may be
stopped by the error
detection control.
Inspect the followings.
•
Minor clogging of filter
•
Minor fouling of heat
exchanger
•
Minor short-circuit
•
Minor shortage of
refrigerant amount
•
Poor compression of
compressor
Considering appropriate
operation control, check
suspicious points.
Inspect the followings for
reference.
•
Major clogging of filter
•
Major fouling of heat
exchanger
•
Major short-circuit
•
Major shortage of
refrigerant amount
•
Compressor protection
ON
•
Indoor fan tap
•
Valid setting of silent
mode
2. Error detection method
3
.
Condition of error displayed
4. Presumable cause
• Faulty 4-way valve operation
• Poor compression of
compressor
• Faulty expansion valve
operation
Note:
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