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BHD-G Service Manual
6. TROUBLESHOOTING GUIDE
6.1 TROUBLESHOOTING GUIDE
In general, possible trouble is classified in three kinds. One is called Starting Failure which is caused from an electri-
cal defect, another is ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper applica-
tion, and the other is called the Structure Damage.
ROOM AIRCONDITIONER VOLTAGE LIMITS:
NAMEPLATE RATING
6.2 IDENTIFY ALL POSSIBLE PCB FAULT CODES
P1: Anti icing protection. When the protection is activated, the compressor will be off while the fan motor is on with high
speed, and the Turbo indicator will be on with the LED displaying P1. After the Anti-icing function is completed, the unit
will restore operation in the previous mode.
P2: Water full protection. When the water tank is full , the compressor and fan motor will shut down and the water full
indicator will flash with LED displaying P2. Under this situation, all buttons are deactivated. After the water is removed,
the unit will restore operating at the previous setting.
E1: Humidity sensor failure. When the output voltage of sensor is lower than 0.5V or higher than 4.95V, the unit will
alarm and the LED displays E1. After the defect is cleared, the unit will not work until the power to the unit is re-stored.
E2: Temperature sensor failure. When the output voltage of sensor is lower than 0.5V or higher than 4.95V, the unit will
alarm and the LED displays E2. After the defect is cleared, the unit will not work until the power to the unit is re-stored.
6.3 TROUBLE SHOOTING
6.3.1 Water level protection function abnormal
Abnormal water level protection function includes the following: (1) There is an alarm when the water level is normal
and (2) There is no alarm for full water.
6.3.2 Automatic trouble alarm
When the line temperature sensor is defective, the motors of the compressor and the fan will shut down, and the
power indicator will flash at 5 Hz.
Portable Dehumidifier with R-410A
115V
MINIMUM
103V
11
Heat Controller, Inc.
MAXIMUM
127V
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