Coil Heating Control - Toshiba ESTIA RUA-CP1701H Service Manual

Monobloc Outdoor Unit

8.4.4. Coil Heating Control

•
This control has the function of heating the compressor by applying a current to the compressor
when not operating instead using a case heater. This control is for the purpose of preventing
stagnation of the refrigerant inside the compressor.
•
Malfunction in the compressor may result if a current is not applied for a specified time before a
test run after installation as was previously the case. Similarly, starting operation after turning the
power OFF and not operating for a long time also requires application of a current before starting
operation, in the same manner as the test run.
•
Application of current is determined by TD and TO sensors. When the TO sensor is defective, a
backup control is automatically performed by the TE sensor. When TO sensor is defective, make a
determination using the LED display of the outdoor interface board.
•
The power is turned off when TD is 30°C or more.
8.4.4.1. Coil Heating 17kW Unit
L
M
8.4.4.2. Coil Heating 21kW Unit
Intermittent current
Continous current
* Total power consumption of inverter and compressor
⚠
While heating the coil, the power sound may be heard. However it is not a trouble.
30W
40W
100W *
100W *
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Service Manual