Drain Pump Control - Fujitsu AUXG18KVLA Service Manual

7-8. Drain pump control

¢ Drain control for dehumidification operation
 During cooling or dry mode
• On the main unit, when the compressor starts, the drain pump unit starts simultaneously.
When the sub unit receives the signal from the main unit, the drain pump of the sub unit starts
simultaneously.
• On the main unit, the drain pump operates continuously for 3 minutes after the compressor is
turned off.
When the sub unit receives the signal from the main unit, the drain pump of the sub unit oper-
ates continuously for 3 minutes after the compressor is turned off.
• When the compressor stops by the
34, the drain pump is turned off in 1 hour after the compressor stops.
• When the float switch is on, the compressor, indoor and outdoor fan motor operation are
stopped. The sub unit sends the signal to the main unit simultaneously.
• When the float switch is turned off, the sub unit sends the signal to the main unit. Drain pump
operates continuously for 3 minutes after the float switch is turned off and then drain pump is
turned off.
• When the float switch turns on continuously for 3 minutes, "failure indication" operates. (It is
necessary to turn off power for release it.)
• When the float switch turns off less than 3 minutes, the unit starts cooling operation. Indoor
fan motor starts after the float switch is turned off and the compressor starts after 3 minutes st.
7-8. Drain pump control
On
Compressor
Off
On
Drain pump
Off
"Anti-freezing control (cooling and dry mode)"
On
Float switch
Off
On
Compressor
Off
On
Indoor fan
Off
On
Drain pump
Off
Less than 3 minutes
3 minutes ST
3 minutes
- (04-31) -
3 minutes
on page 04-
7. Various control