High Wall, Heat Pump Type
Service Manual
75
Toshiba
10-3.First Confirmation
10-3-1. Confirmation of Power Supply
Confirm that the power breaker operates (ON) normally.
10-3-2. Confirmation of Power Voltage
Confirm that power voltage is AC 220–230–240 ± 10%.
If power voltage is not in this range, the unit may not operate normally.
10-3-3. 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 controlling and maintaining
of air conditioner.
Table 10-1-1
10-4.Primary Judgment
To diagnose the troubles, use the following methods.
• Judgment by flashing LED of indoor unit
• Self-diagnosis by service check remote controller
• Judgment of trouble by every symptom
Firstly use the method 1) for diagnosis. Then, use the method 2) or 3) to diagnose the details of troubles.
No.
Operation of air conditioner
Description
1
When power breaker is turned “ON”, the operation
indicator (Green) of the indoor unit flashes.
The OPERATION lamp of the indoor unit flashes when
power source is turned on. If [START/STOP] button is
operated once, flashing stops.
(Flashes also in power failure)
2
Compressor may not operate even if the room
temperature is within range of compressor-ON.
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.
3
In Dry and SLEEP MODE, FAN (air flow) display does not
change even though FAN (air flow select) button is
operated.
The air flow indication is fixed to [AUTO].
4
Increasing of compressor motor speed stops approx. 30
seconds after operation started, and then compressor
motor speed increases again approx. 30 seconds after.
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.
5
In AUTO mode, the operation mode is changed.
After selecting Cool or Heat mode, select an operation
mode again if the compressor keeps stop status for 15
minutes.
6
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.
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.
+00A08-010_01EN_SVM_HighWallHeatPump.book Page 75 Wednesday, March 4, 2009 11:22 AM
