Fujitsu AUXG18KVLA, Service Manual

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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. )
3 minutes
On
Off
On
Off
Float switch
Drain pump
• Release condition
Drain pump operates continuously for 3 minutes after the float switch is turned off and then
drain pump is turned off.
7-9. 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 30
Retry set number 3
When the compressor fails to start in the retry set number above, the compressor is stopped.
7-10. 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.
7-11. Peak cut operation
The current value is limited to reduce the power consumption by external input.
Peak cut level Level 1 Level 2 Level 3 Level 4
Peak cut for rated capacity
Forced thermostat
off
50% 75% 100%
NOTES:
• During defrost operation, peak cut operation becomes invalid.
• Even during the peak cut operation, the operations of current overload, economy, and low noise
are effective and the outdoor unit operates by lowest current of them.
7-8. Drain pump control
- (04-32) -
7. Various control
CONTROL AND FUNCTIONS CONTROL AND FUNCTIONS