700870,700875,700877
SERVICE MANUAL
24
page
Portable Air Condi oners
Control Specifi ca ons
1)EVAPORATOR FAN MOTOR
• When the BLOWER bu on is pressed, the RL1/3 (fan motor HI/LOW) relay on
the relay board turns on, opera ng the fan.
Specifi ca ons:
- RL1/3 (Fan motor HI-LOW) relay output: 10 A at AC 250 V
2)Compressor start control
• When the ON/OFF bu on is pressed, the RL4 relay on the relay board
turns on, opera ng the compressor.
Specifi ca ons:
- RL4 (Compressor On-Off ) relay output: 5 A at AC 250 V
3)An -freeze control
• An -freeze controls turns the compressor on and off by turning the RL4
relay on in accordance with the freeze protec on thermistor (TH3)
temperature. As a result, decreases in cooling performance due to frost
buildup on the evaporator are prevented.
• Compressor off condi ons: Freeze protec on thermistor (TH3)
temperature ≤ 28.4 °F (-2 °C)
• Compressor on (recovery) condi ons: TH3 (ICE temperature) ≥ 33.8 °F (1 °C)
ON
OFF
C3
28.4 °F
(-2 °C)
33.8 °F
(1 °C)
TH3 temperature
(Evaporator out temperature)
