Electronic Functions; Abbreviation; Display Function - Heat Controller VMH C Series Service Manual

Heat Controller

8. Electronic functions

8.1 Abbreviation

T1: Indoor room temperature
T2: Coil temperature of evaporator
T3: Coil temperature of condenser
T4: Outdoor ambient temperature
T5: Compressor discharge temperature
TS: Preset temperature

8.2 Display function

8.2.1 Icon explanation on indoor display board.
① Auto indicator
This indicator illuminates when the air conditioner is in AUTO operation.
② Timer indicator
This indicator illuminates when TIMER is set ON/OFF.
③ PRE.-DEF. Indicator
This indicator illuminates when the air conditioner starts defrosting automatically or when the warm air
control feature is activated in heating mode.
④ TEMPERATURE indicator
Usually this displays the temperature settings. When changing the setting temperature, this indicator
begins to flash, and stops 20 seconds later. It displays the room temperature when the air conditioner
is in FAN only operation, and the range of that is 32~122°F (or 50°C). When the unit stops operation, it
returns to original factory settings. It will also display the codes when a fault occurs.
⑤ Frequency indicator
VMH 30, 36 SerieS
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Service Manual