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During heating mode or fan mode and when operation is stopped
• Triggering condition
Drain pump is turned on at the same time that the float switch is turned on.
• Operation details
When the float switch turns on continuously for 3 minutes, "failure indication" operates. There-
after, even if the float switch turns off, the "failure indication" is not released. (It is necessary to
turn off power for release it. )
• Release condition
Drain pump operates continuously for 3 minutes after the float switch is turned off and then
drain pump is turned off.
6-8. Prevention to restart for 3 minutes (3 minutes st)
When the compressor fails to start for the number of times below, it does not enter operation status
for 3 minutes.
Retry number
Retry set number
When the compressor fails to start in the retry set number above, the compressor is stopped.
6-9. 4-way valve control
• If heating mode is selected at the compressor start, 4-way valve is energized for heating.
• When the air conditioner is switched between cooling and heating mode, compressor is stopped,
and the 4-way valve is switched when the 3 minutes passes and the compressor is started.
4-way valve
4-way valve
4-way valve
power supply
Compressor
6-7. Drain pump control
On
Float switch
Off
On
Drain pump
Off
switching
polarity
200
ms
Heating mode
Cooling mode
1,500
200
ms
ms
- (01-28) -
3 minutes
50
3
2,000±100
ms
6. Various control
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