Operation Modes And Functions - Heat Controller VMH C Series Service Manual

Heat Controller
If T4(outdoor ambient temperature) ＜37°F(3°C) and the machine connects to power supply for the
first time or if T4＜37°F(3°C) and compressor has stopped for over 3 hours, the compressor crankcase
heater will turn on.
----Preheating mode:
A weak current flow through the coil of the compressor from the wiring terminal of the compressor, the
compressor will be heated without operation.
----Preheating release condition:
If T4＞41°F (5°C) or the compressor starts running, preheating function will stop.
---- Heating cable
Starts when T4<41°F (5°C) and stops when T4>59°F (15°C)

8.4 Operation Modes and Functions

8.4.1 Fan mode.
(1) Outdoor compressor stop.
(2) Temperature setting function is disabled, and no setting temperature is displayed.
(3) Indoor fan can be set to high/med/low/auto.
(4) The louver operates same as in cooling mode.
(5) Auto fan:
The action of auto fan in fan-only mode is the same as auto fan in cooling mode with 75.2°F (24°C) set
temperature.
VMH 30, 36 SerieS
°F °C
℃
81.5° (27.5)
27.5
High
80.6° (27.0)
27.0
77.9° (25.5) 25.5
Medium
77° (25.0)
25.0
Low
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Service Manual