Primary Judgement - Toshiba RAS-10NKV-E Service Manual

10-1-3. 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.
No. Operation of air conditioner
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 ECONO. 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 controller 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.

10-2. Primary Judgement

To diagnose the troubles, use the following methods.
(1) Judgement by flashing LED of indoor unit
(2) Self-diagnosis by service check remote controller
(3) Judgement 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 10-1-1
The OEPRATION 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
controller 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.
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FILE NO. SVM-05026
Descriptions