Sanyo CG1411 User Manual download pdf (Page 38)

8-3-2. Refrigerant Control

(1) Thermistor 1

1) Initial check:

Must be able to confirm temperature increase of 2°F (1°C) within approximately 1 minute.

Objectives: 1. To detect error in switching reversing valve

2. To detect disconnection of Thermistor 1

2) Limit on amount of combustion at low temperature:

When starting up at low temperature, this function prevents rapid increase in temperature of refrigerant.

1. Minimum combustion at 50°F (10°C) or below

2. Limits combustion up to 70% of the maximum rated power at 95°F (35°C) or below

3) Bypass valve operation:

Opens the bypass valve at 117°F (47°C) and reduces power consumption.

4) Limit on amount of combustion at high load:

● Limits amount of combustion at 144°F (62°C)

Resets when temperature decreases to 140°F (60°C).

● Stops combustion at 149°F (65°C)

Resets when the temperature decreases to 131°F (55°C). (Compressor continuously operates.)

Error stop occurs after combustion stops eight times. (Operation lamp on indoor unit blinks.)

(2) Thermistor 2

1) Limit on amount of combustion:

Limits combustion when temperature exceeds 131°F (55°C). The range is proportionally controlled

between the minimum and maximum temperatures.

2) Combustion stop:

Stops combustion when temperature exceeds 185°F (85°C).

Error stop occurs after combustion is interrupted (stops) eight times. (Operation lamp on indoor unit

blinks.)

3) Detection of bypass valve operation

Must be able confirm temperature increases 5°F (3°C) within approximately 1 minute.

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Sanyo CG1411 User Manual Page 38