Daikin LXE10E-A - Page 115

4-4
(2) Automatic pump down operation
Once the automatic pump down is started, all of the service works from refrigerant collection into
the receiver, to the equalizing in suction piping system, can be executed automatically.
When "Good" is displayed, service works such as replacing the dryer, etc. can be conducted
without any other operation.
Step
qwert
[Preperation]
Turn on
Automatic pump
down.
Normal operation
for 30 minute
※
1
［Pump down］※2
［
Termination]
EV full close
Termination
"GOOD"
Pump down
start
Compressor
stop at
LP≦–55kPa
Compressor
stop for 20
seconds.
COMP ON ON OFF OFF OFF
EFM High speed High speed High speed OFF OFF
CFM ON ON ON OFF OFF
LSV ON
ESV ON
ISV
ON (2nd) ※3
HSV
ON (1st) ※3
EV 400pls 800pls 800pls 800pls 0pls(fullclose)
［
Pressure
equalizing
］
All stop for 40
seconds.
Increase LPT
to 0〜300kPa
DSV
BSV
SMV 100% 100% 100% 100% 100%
RSV
Refrigerant collected line after automatic pump down operation
HSV
Compressor
Reheat coil (optional)
BSV
DSV
LSV
ESV
E
V
Evaporator
RSV
DPR
Condenser
Checkvalve
Receiver
SMV
ISV
Drier
Pressure after finish of automatic pumpdown
operation: From 0 to 300Kpa
※1. If HPT exceeds 1700 kPA, no operation is executed for thirty seconds.
※2. The pumpdown operation described in w ⇒ e shown in the table above is repeated
depending on the status 20 seconds after the compressor is stopped (three times, maximally).
※3. If LPT exceeds 0 kPa 40 seconds after the unit is stopped completely, next operation of
shifting from "HSV ON" to "ISV ON" is not executed.
04LXE10E-A(1-8)07.2.206:08PMページ4-4
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