EXTRE COOLING XC-14A Service Manual page 24

XC-14A, XC-22A, XC-30A SERVICE MANUAL
Control Specifications
1)EVAPORATOR FAN MOTOR
• When the BLOWER button is pressed, the RL1/3 (fan motor HI/LOW) relay on the
relay board turns on, operating the fan.
Specifications:
- RL1/3 (Fan motor HI-LOW) relay output: 10 A at AC 250 V
2)Compressor start control
• When the ON/OFF button is pressed, the RL4 relay on the relay board
turns on, operating the compressor.
Specifications:
- RL4 (Compressor On-Off) relay output: 5 A at AC 250 V
3)Anti-freeze control
• Anti-freeze controls turns the compressor on and off by turning the RL4
relay on in accordance with the freeze protection thermistor (TH3)
temperature. As a result, decreases in cooling performance due to frost
buildup on the evaporator are prevented.
• Compressor off conditions: Freeze protection thermistor (TH3)
temperature ≤ 28.4 °F (-2 °C)
• Compressor on (recovery) conditions: TH3 (ICE temperature) ≥ 33.8 °F (1 °C)
ON
C3
OFF
Page 24
28.4 °F 33.8 °F
(-2 °C) (1 °C)
Xtreme Power Conversion® (XPC) Corporation
Portable Air Conditioners
TH3 temperature
(Evaporator out temperature)