Operation; Function Of Control - Heat Controller DMH18DB-1 Service Manual

Operation

Function of control

1. MAIN UNIT FUNCTION
• DISPLAY
Operation Indicator
• On while in appliance operation, off while in appliance pause
• Flashing while in disconnection or short in Thermistor (3 sec off / 0.5 sec on)
Sleep Timer Indicator
• On while in sleep timer mode, off when sleep timer cancel or appliance operation pause
Timer Indicator
• On while in timer mode (on/off), off when timer mode is completed or canceled
Defrost Indicator
• Off except when hot start during heating mode operation or while in defrost control
I Cooling Mode Operation
• When the intake air temperature reaches 0.5°C(0.9°F) below the setting temp, the compressor and the outdoor
fan stop.
• When it reaches 0.5°C(0.9°F) above the setting temp, they start to operate again.
Compressor ON Temp
Compressor OFF Temp
• While in compressor running, operating with the airflow speed set by the remote control. While compressor is
off fan operates at low speed regardless of the setting.
I Soft Dry Operation Mode
• When the dehumidification operation input by the remote control is received, the intake air temperature is
detected and the setting temp is automatically set according to the intake air temperature.
26°C(78.8°F) ≤ Intake Air Temp
24°C(75.2°F) ≤ Intake Intake Air Temp<26°C(78.8°F)
18°C(64.4°F) ≤ Intake Intake Air Temp<24°C(75.2°F)
Intake Air Temp<18°C(64.4°F)
• While compressor off, the indoor fan repeats low airflow speed and stop.
• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidification
operation and 4-min compressor off repeat.
Compressor ON Temp.
Compressor OFF Temp.
• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.
I Heating Mode Operation
• When the intake air temp reaches +3°(37.4°F)...above the setting temp, the compressor is turned off. When
below the setting temp, the compressor is turned on.
Compressor ON Temp.
Compressor OFF Temp.
• While compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C(68°F), when above
27°C(80.6°F) , it operates with the low or setting speed. When the indoor pipe temp is between 20°C(68°F) and
➲ Setting Temp+0.5°C(0.9°F)
➲ Setting Temp-0.5°C(0.9°F)
➲ Setting Temp+0.5°C(0.9°F)
➲ Setting Temp-0.5°C(0.9°F)
➲ Setting Temp.
➲ Setting Temp.+3°C(37.4°F)
➲ 25°C(77°F)
➲ Intake Air Temp-1°C(30.2°F)
➲ Intake Air Temp-0.5°C(31.1°F)
➲ 18°C(64.4°F)
Operation
Service Manual 35