Operation Section
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5.3 Control Specifications
(1) Fan control
• When the FAN button is pressed, the 52ID (fan motor on/off) relay on the relay board turns on,
operating the fan.
• For the 15SF, the 52ID relay turns the auxiliary relay on to operate the fan.
Specifications:
- 52ID (Fan motor On-Off) relay output: 5 A at AC 250 V
(2) Compressor start control
• When the ON/OFF button is pressed, the 52CM relay on the relay board turns on, operating the
compressor.
Specifications:
- 52CM (Compressor On-Off) relay output: 20 A at AC 250 V
(3) Anti-freeze control
• Anti-freeze controls turns the compressor on and off by turning the 52CM relay on in accordance
with the freeze protection thermistor (CTS) temperature. As a result, decreases in cooling
performance due to frost buildup on the evaporator are prevented.
• Compressor off conditions: Freeze protection thermistor (CTS) temperature
-1.1 °C
• Compressor on (recovery) conditions: CTS temperature
15.6 °C
ILL00719-00
ON
OFF
52CM
-1.1 °C
15.6 °C
CTS temperature
(Freeze protection thermistor temperature)
