23
Heat Controller
VMH 30, 36 SerieS
Service Manual
21
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)
Current
(A)
I3COOL
I2COOL
I1COOL
Compressor off
Frequency decrease
Frequency hold
Normal operation
