Heat Controller BG-123G User Manuals

Table of Contents

• 1. PRECAUTION

  2
• 1.1 Safety precaution

  2
• 1.2 Warning

  2
• 1.3 Caution

  2
• 2. FEATURES AND PANEL

  3
• 2.1 Features

  3
• 2.2 Control panel illustration

  3
• 3. UNIT DIMENSION

  6
• 3.1 Unit dimension:

  6
• 4. OPERATION LIMITS

  6
• 4.1 Cooling operation

  6
• 4.2 Electric heating operation

  7
• 5. PROTECTION FUNCTION

  8
• 5.1 Symbol & Meaning

  8
• 5.2 Protection Function

  8
• 6. COMPONENT OPERATION & TESTING

  9
• 6.1 COMPRESSORS

  9
• 6.2 FAN MOTOR

  11
• 6.3 CAPACITOR, RUN

  11
• 6.4 THERMOSTAT ADJUSTMENT

  12
• 6.5 HEATING ELEMENT - See Figure 6

  12
• 6.6 VALVE, DRAIN PAN (see Figure 7)

  13
• 6.7 SEALED REFRIGERATION SYSTEM REPAIRS

  13
• 7. WIRING DIAGRAM

  15
• 8. TROUBLESHOOTING

  17
• 8.1 Flow Chart

  17
• 8.2 General Troubleshooting

  27
• 8.3 Troubleshooting Cooling

  30
• 8.4 Troubleshooting Heating (Cooling/Electric Heater Models)

  32
• 9. INSTALLATION ACCESSORY LIST

  34
• 10. CHARACTERISTIC OF TEMPERATURE SENSOR

  34