11. POINTS TO DIAGNOSE

11-1. Indoor Unit Alarm Signal

Alarm Signal

Error Meaning

Operation

Information

 

 

 

 

 

Misconnection of inter-unit wiring

Heating • Cooling • Dry

Connect correctly

 

 

 

 

 

Room temp. thermistor is defective

Heating • Cooling • Dry

Normal: 9 – 11 k Ω at 50°F

 

 

 

4 – 6 kΩ at 77°F

 

 

 

 

Power Lamp

Heat exch. thermistor is defective

Heating • Cooling • Dry

Normal: 100 – 120 k Ω at 50°F

Flashing

 

 

50 – 60 kΩ at 77°F

 

 

 

 

 

Fan motor is defective

Heating • Cooling • Dry

Alarm signal appears in 1 min.

 

 

 

 

 

Amp. current is high

Heating • Cooling • Dry

More than 17 amp.

 

 

 

 

 

Amp. current is low

Heating • Cooling • Dry

Less than 0.8 amp.

 

 

 

 

 

Heat exch. thermistor detects high temp

Heating

More than 154°F (68°C)

 

 

 

 

11-2. Manifold Pressure

Outdoor Unit

Fuel

Inlet Pressure W.C. (kPa)

 

Manifold Pressure W.C. (kPa)

 

 

 

Low

 

High

Lighting (10 sec.)

 

 

 

LD4, 5 Flashing

LD2, 3 Flashing

(verification)

 

 

 

 

 

 

 

CG1411

Natural gas

7.0 (1.74)

0.63 (0.157)

 

3.43 (0.853)

2.32 (0.579)

To set manifold pressure there are 2 settings – low pressure and high pressure.

Use SW1 to move to the 2 modes used to adjust the two pressures.

Press SW1 1 time for low pressure.

Press SW1 2 times for high pressure.

Press SW1 3 times for normal operation.

Use VR1 to set the low, lighting pressure and VR2 to set the high pressure.

Step 1: Set low pressure

1.Press SW1 and hold until LEDs 4 and 5 flash.

2.Adjust the low pressure with VR1 to 0.63 inches of water column.

Step 2: Set high pressure

1.Press SW1 again and LEDs 1 and 2 will flash.

2.Adjust pressure with VR2 to 3.43 inches of water column.

Step 3: Set lighting pressure

Lighting pressure will be set automatically from Step 1 and Step 2.

NOTE

Check these settings 2 or 3 times to insure all are correct then reset until no LEDs flash.

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Sanyo CG1411, KGS1411 service manual Points to Diagnose, Indoor Unit Alarm Signal, Manifold Pressure

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