Daikin LXE10E-A Service Manual page 115

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(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
[Preperation]
Turn on
Automatic pump
down.
Normal operation
for 30 minute
COMP
EFM High speed
CFM
LSV
ESV
ISV
HSV
DSV
BSV
RSV
SMV
EV
※1. If HPT exceeds 1700 kPA, no operation is executed for thirty seconds.
※2. The pumpdown operation described inw ⇒ eshown 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.
Evaporator
Reheat coil (optional)
RSV
BSV
Checkvalve
SMV
Compressor
Refrigerant collected line after automatic pump down operation
q w
［Pump down］※2
Pump down
start
Compressor
stop at
LP≦–55kPa
※ 1
ON ON
High speed
ON ON
ON
ON
100% 100%
400pls 800pls
Pressure after finish of automatic pumpdown
operation: From 0 to 300Kpa
EV
HSV
DSV
Condenser
DPR
Receiver
ISV
4-4
e
［ Pressure
Compressor
equalizing ］
stop for 20
All stop for 40
seconds.
seconds.
Increase LPT
to 0〜300kPa
OFF OFF
High speed OFF
ON OFF
ON (2nd) ※3
ON (1st) ※3
100% 100%
800pls 800pls
ESV
LSV
r t
［ Termination]
EV full close
Termination
"GOOD"
OFF
OFF
OFF
100%
0pls(fullclose)
Drier