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11.6. Outdoor Fan Control
• Outdoor fan speed changes according to outdoor pipe temperature.
•The fan speed is controlled by the timing of turning the outdoor fan ON and OFF within an interval.
•There unit compares current temperature (T2) with previous (2 seconds before) temperature (T1) and decides the outdoor fan
ON time (X).
Outdoor fan ON time (X) is a variable with the range of 200ms to 1600ms or continuosly ON.
• Every 2 minutes, the outdoor pipe temperature is detected and the outdoor unit fan speed is changed automatically.
11.6.1. Outdoor Fan Remaining Heat Removal Control
• When compressor stop, outdoor fan operates at High speed for 1 minute to remove the remaining heat.
11.7. Test Run (Forced Cooling mode)
• Test run is necessary after installation is completed.
• To enable test run operation, at outdoor PCB, set the DS1 Switch 1 to ON position.
• Press Test Run button for 1 second.
11.7.1. Valve Error
• During test run, if the 3-way valve is close, valve error is shown on wired remote control.
• This control is to protect the compressor.
• Valve error is detected if comply with conditions below:
- Power is on for the first time and within 5 minutes from compressor starts (However, the unit is considered power on for first
time when compressor starts operating continuously for 7 minutes).
- Indoor heat exchanger temperature at compressor start - 3ºC < current indoor heat exchanger temperature for 1 minute.
- Indoor suction temperature - 3ºC < current heat exchanger temperature for 5 minutes.
Judgement
45°C
T2
40°C
T2
45°C & T2
T1
40°C
T2
45°C & T2
T1
35°C
T2
40°C
30°C
T2
35°C & T2
T1
30°C
T2
35°C & T2
T1
T2
30°C
Outdoor fan ON time (X)
X = X + 100ms
X = X + 50ms
X = X
X = X
X = X - 50ms
X = X
X = X - 50ms
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