MovinCool CM25 Service Manual - Manual (Page 36)

Operation Section
36
5.11 Evaporator Fan Motor Operation
• The evaporator fan motor is controlled by signals from the WMC or MWT.
(1) When the WMC is connected
• ON/OFF control and fan speed are determined by the WMC settings.
Fan motor settings
- AUTO: The fan motor turns ON when the compressor is ON, and OFF when the compressor
is OFF.
- RUN: The fan motor continuously operates, regardless of whether the compressor is ON or
OFF.
Fan speed settings
- HI: Fan speed = 880 rpm
- LO: Fan speed = 780 rpm
(2) When the MWT is connected
• ON/OFF control and fan speed are determined by the MWT settings.
5.12 Condenser Fan Motor Operation
• The condenser fan motor turns ON when the compressor is ON, and OFF when the compressor
is OFF.
In addition, fan motor speed is determined by the condenser inlet air thermistor (ODS), and
compressor speed.
When ODS
 30°C
- Compressor 30-40 rps: Fan speed = LO 710 rpm
- Compressor 40-90 rps: Fan speed = HI 865 rpm
ODS < 30°C
- Fan speed = HI 865 rpm
Terminal No. Function Signal Input
G Fan HI OFF OFF ON ON
G1 Fan LO OFF ON OFF ON
Evaporator fan motor speed OFF HI: 880 rpm LO: 780 rpm