Heat Controller VMH C Series Service Manual page 23

Heat Controller
Note:
When the value of T1 minus TS stays in the same temp. zone for 3 minutes, the compressor will run as
the below rules:
A~E: Increases the frequency to higher level until to F8.
F: Keeps the current frequency.
G: Decreases the frequency to the lower level until F1.
H: Runs at F1 for 1hour (If T1-TS<35°F (2°C), the compressor will stop.
Meanwhile, the compressor running frequency is limited by the current.
Off: Compressor stop.
Decrease: Decrease the running frequency to the lower level.
Hold: Keep the current frequency.
Resume: No limitation for frequency.
Note:
When AC is in "hold" zone for 3 minutes, the compressor frequency will rise to the higher level. (The
frequency will increase twice at most)
VMH 30, 36 SerieS
Current
(A)
Compressor off
I3COOL
Frequency decrease
I2COOL
I1COOL
Frequency hold
Normal operation
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Service Manual