Points To Diagnose; Indoor Unit Alarm Signal; Heating; Manifold Pressure - Sanyo CG1411 Service Manual

11. POINTS TO DIAGNOSE

11-1. Indoor Unit Alarm Signal

Alarm Signal
Misconnection of inter-unit wiring
Room temp. thermistor is defective
Power Lamp Heat exch. thermistor is defective
Flashing
Fan motor is defective
Amp. current is high
Amp. current is low
Heat exch. thermistor detects high temp

11-2. Manifold Pressure

Outdoor Unit Fuel
CG1411 Natural gas
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.
Error Meaning
Inlet Pressure W.C. (kPa)
7.0 (1.74)
Operation
Heating • Cooling • Dry Connect correctly
Heating • Cooling • Dry Normal: 9 – 11 kΩ at 50°F
Heating • Cooling • Dry Normal: 100 – 120 kΩ at 50°F
Heating • Cooling • Dry Alarm signal appears in 1 min.
Heating • Cooling • Dry More than 17 amp.
Heating • Cooling • Dry Less than 0.8 amp.

Heating

More than 154°F (68°C)
Manifold Pressure W.C. (kPa)
Low
LD4, 5 Flashing LD2, 3 Flashing
0.63 (0.157) 3.43 (0.853)
50
Information
4 – 6 kΩ at 77°F
50 – 60 kΩ at 77°F
High Lighting (10 sec.)
(verification)
2.32 (0.579)