MovinCool CM25 Service Manual - Manual (Page 35)

Operation Section
35
5.8 Basic Operation
• The following components are controlled based on settings and signals from the WMC or MWT
in accordance with signals from various sensors: compressor, evaporator fan motor, condenser
fan motor, electronic expansion valve, internal drain pump.
5.9 Compressor Operation
(1) Startup speed control
• The compressor operates at 40 rps for 120
seconds after cooling operation begins. Once
the refrigeration cycle stabilizes, the inverter
controls compressor speed.
< NOTE >
While under startup speed control, the unit continues to operate to protect the refrigerant system,
even if cooling operations are suspended by the WMC or MWT.
When startup speed control is completed and cooling operation is suspended within 120 seconds,
the "COOL" display flashes for the WMC.
(2) Delay control
• After the power supply is turned on, or after the compressor is stopped, compressor startup is
delayed for a fixed time period to prevent overloading the compressor.
Specifications:
- Time Delay: 120 sec.
5.10 Electronic Expansion Valve Operation
• The electronic expansion valve automatically controls its valve position to optimize the
refrigerant cycle.
I003169
120 sec
Compressor Speed (rps)
40
Start of
Compressor
Operation
Transition to
Normal Control
Time