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FILE NO. SVM-07008
11-1-3. Operation which is not a trouble (Program operation)
For controlling the air conditioner, the program operations are built in the microcomputer as described in the
following table. If a claim is made for running operation, check whether or not it meets to the contents in the
following table. When it does, we inform you that it is not trouble of equipment, but it is indispensable for control-
ling and maintaining of air conditioner.
11-2. Primary Judgment
To diagnose the troubles, use the following methods.
(1) Judgment by flashing LED of indoor unit
(2) Self-diagnosis by service check remote control
(3) Judgment of trouble by every symptom
Firstly, use the method (1) for diagnosis. Then, use the method (2) and (3) to diagnose the details of troubles.
Table 11-1-1
1 When power breaker is turned “ON”,
the operation lamp (Green) of the
indoor unit flashes.
2 Compressor may not operate even if
the room temperature is within range of
compressor-ON.
3 In Dry and ECO. mode, FAN (air flow)
display does not change even though
FAN (air flow select) button is operated.
4 Increasing of compressor motor speed
stops approx. 30 seconds after
operation started, and then compressor
motor speed increases again approx.
30 seconds after.
5 The set value of the remote control
should be below the room temperature.
6 In AUTO mode, the operation mode is
changed.
7 In HEAT mode, the compressor motor
speed does not increase up to the
maximum speed or decreases before
the temperature arrives at the set
temperature.
No. Operation of air conditioner Description
The OPERATION lamp of the indoor unit flashes when power source
is turned on. If [ ] button is operated once, flashing stops.
(Flashes also in power failure)
The compressor does not operate while compressor restart delay
timer (3-minutes timer) operates. The same phenomenon is found
after power source has been turned on because 3-minutes timer
operates.
The air flow indication is fixed to [AUTO].
For smooth operation of the compressor, the compressor motor speed
is restricted to Max. 41 rps for 2 minutes, and Max.91 rps for 2 minutes
to 3 minutes, respectively after the operation has started.
If the set value is above the room temperature, Cooling operation is
not performed. And check whether battery of the remote control is
consumed or not.
After selecting Cool or Heat mode, select an operation mode again if
the compressor keeps stop status for 15 minutes.
The compressor motor speed may decrease by high-temp. release
control (Release protective operation by temp.-up of the indoor heat
exchanger) or current release control.