Sanyo SPW-U255SH - Page 397

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Important Information Concerning Pump Down
Observe the following items when using pump down
operation to recover the refrigerant.
(1) If the length of inter-unit tubing exceeds 30
m, pump down cannot be used to recover the
refrigerant.
(The overload protection device may be activated.)
(2) Short the “PUMP DOWN” pin (or press and hold
the “PUMP DOWN” button) on the outdoor unit
PCB for 1 second or longer.
During refrigerant recovery, LED 1 blinks and
LED 2 is lit.
Close the liquid-side valve during refrigerant
recovery.
If the unit is operated for 10 minutes or longer
with the liquid-side valve open, operation will be
stopped, although no alarm will be displayed on
the remote controller.
If this occurs, close the valve and restart
operation.
(3) When the valve service port pressure is
approximately 0.1 MPa, short the “PUMP DOWN”
pin (or press the “PUMP DOWN” button) again to
end refrigerant recovery.
In order to protect the compressor, do not
continue operating to generate a negative
pressure in the inter-unit tubing.
3 – 4 HP (Single-phase))
EEPROM
LED1LED2
(S003)
The PUMP DOWN (CN042) pin is located at the right of the outdoor
unit PCB, as shown in the above figure
.
5 HP (Single-phase), 3 – 6 HP (3-phase)
S002
S003 S001 S005
IC
001
LED 1 LED 2
The S005 (PUMP DOWN) button is located at the centre right of the
outdoor unit PCB, as shown in the above figure.
AUTO ADD (CN041)
PUMP DOWN (CN042)
System address
(S002)
AUTO ADD PUMP DOWN
SM830160-03ClassicPAC-iA4.ind3333SM830160-03ClassicPAC-iA4.ind3333 2010/02/1610:28:162010/02/1610:28:16