Preface; Safety Precautions; Insulation Resistance Test; Unit Features - Heat Controller BHD-301-G Service Manual

Heat Controller, Inc.

1. PREFACE

This SERVICE MANUAL provides various servicing information for the unit, including the mechanical and electrical
parts, etc. This dehumidifier was manufactured and assembled under a strict quality control system.
The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit.

1.1 SAFETY PRECAUTIONS

1. When servicing the unit, set the POWER SWITCH to OFF and UNPLUG the POWER CORD.
2. Inspect the service cord for damage or wear.
If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit.
3. After servicing the unit, conduct an insulation resistance test to protect the user from being exposed to
electrical shock hazards.

1.2 INSULATION RESISTANCE TEST

1. Unplug the power cord and connect a jumper lead between the two (2) live test pins.
2. The grounding conductor (yellow/green) should be open.
3. Measure the resistance value with an ohm meter between the jumped lead and each exposed metallic part
on the unit at all the positions (except OFF) on the ROTARY SWITCH or POWER SWITCH.
4. The value should be over 1MΩ.

1.3 UNIT FEATURES

• Auto-defrosting.
• Suitable for low-temperature and high-humidity weather.
• Water-full alarm and auto shutdown functions.
• Powerful dehumidification in wide temperature range between 41°F-90°F (5°C~32°C)
• LED display.
• Humidity display and setting.
• Self diagnose and defect display

1.4 CONTROL LOCATIONS

Control pads:
When you push the button to change operation modes, the unit will make a beep sound to indicate that it is chang-
ing modes.
1. POWER
Press to turn the dehumidifier on and off.
2. CHECK FILTER
The check filter feature is a reminder to clean the Air Filter for more efficient operation. The LED light will
illuminate after 250 hours of operation. To reset after cleaning the filter, press CHECK FILTER and the light
will go off.
Portable Dehumidifier with R-410A
2
BHD-G Service Manual