Coil Heating Control; Short Intermittent Operation Preventive Control - Toshiba RAS-24N3KV2-A Service Manual

Item
5. Coil heating 1) This control function heats the compressor by turning on the stopped compressor instead of a case
control
heater. It purposes to prevent stagnation of the refrigerant inside of the compressor.
2) As usual, turn on power of the compressor for the specified time before a test run after installation;
otherwise a trouble of the compressor may be caused.
As same as a test run, it is recommended to turn on power of the compressor beforehand when
starting operation after power of the compressor has been interrupted and left as it is for a long time.
3) Judgment for electricity is performed by TD and TO sensors.
If TO sensor is defective, a backup control is automatically performed by TE sensor.
For a case of defective TO sensor, judge it with outdoor LED display.
Using TD sensor and TE sensor.
4) The power is turned off when TD is 30°C or more.
REQUIREMENT
In some cases, the sound of power-ON may be
heard. It is not abnormal.
• Power-ON condition TD < 30˚C
TO
18˚C
15˚C
10˚C
8˚C
• Power-ON condition TD < 30˚C
TE
20˚C
18˚C
12˚C
10˚C
REQUIREMENT
While heating the coil, the power sound may be heard. However it is not a trouble.
1) For 3 to 10 minutes after operation start, in some cases, the compressor does not stop to protect
6. Short
intermittent
the compressor even if receiving the THERMO OFF signal from indoor.
operation
However it is not abnormal status. (The operation continuance differs according to the operation
preventive
status.)
control
2) When the operation stops by the remote controller, the operation does not continue.
Operation flow and applicable data,etc
(Normal time)
No power
Intermittent power-ON
10 minutes: ON /
5 minutes: OFF
Output [40W or equivalent]
Continuous power-ON
Output [40W or equivalent]
(In defective TO sensor)
No power
Intermittent power-ON
10 minutes: ON /
5 minutes: OFF
Output [40W or equivalent]
Continuous power-ON
Output [40W or equivalent]
– 33 –
FILE NO. SVM-13004
Description