Waterstage WS G140DC6 Series, Installation And Operating Manual

Page: 21 / 64

- - 6 - LED display changes after 1 minute as shown in
the figure below:
POWER
ERROR
PUMP
DOWN
(L1)
LOW NOISE PEAK CUT
MODE (L2) (L3) (L4) (L5) (L6)
● ○ ● ○ ○ ○ ○ ○
Fans and compressor stop automatically. If the pump
down is successfully completed (the above LED display
is shown), the outdoor unit remains stopped until the
power is turned off.
-
-
7
- Turn the power off.
POWER
ERROR
PUMP
DOWN
(L1)
LOW NOISE PEAK CUT
MODE (L2) (L3) (L4) (L5) (L6)
○ ○ ○ ○ ○ ○ ○ ○
Note :
-To stop pump down, press the "PUMP DOWN" switch
again.
-To start the pump down again after the compressor is
automatically stopped due to an error, turn the power
off and open the 3-way valves. Wait 3 minutes, turn the
power on and start the pump down again.
-When starting the operation after completion of the
pump down, turn the power off, and then open the
3-way valves.
DIP SW
Interface card
LED2
(green)
LED1
(red)
OFF ON
figure 19 - Location of DIP switches and diodes
on the hydraulic unit interface card
2 7 5 Pump down operation (Refrigerant collecting
operation) 3-phase outdoor unit
Perform the following procedures to collect the
refrigerant.
-
-
1
- Turn OFF the start/stop switch
(ref. 3 , figure 7, page 10 ).
-
-
2
- Remove the front panel.
Then turn ON the DIP SW 1 on the interface card.
-
-
3
- Turn ON the start/stop switch.
(Green and Red LED on the board start flashing ;
1 sec. on / 1 sec. off repeated).
-
-
4
- The outdoor unit begins cooling operation
about 3 minutes after switching ON.
Close the liquid valve on the outdoor unit 1 minute
after operation starts.
-
-
5
- Close the gas valve on the outdoor unit 1-2 minutes
after closing the liquid valve, while the outdoor unit
keeps running.
-
-
6
- Disconnect the power supply.
Remarks :
-Make sure to turn OFF the start/stop switch before
touching DIP SW.
-The pump down operation cannot be activated even
if DIP SW is changed while heat pump's power is on.
-Do not forget to turn back DIP SW 1 on the interface
card to OFF, after the pump down operation has been
completed.
-When the pump down operation is repeated,
temporarily turn OFF the start/stop switch after opening
the closed valves (both liquid and gas).
-Then turn ON the start/stop switch again after
2 - 3 minutes and perform the pump down operation.
Installation and operating manual "1533 - EN" - 21 -
Air to Water Heat Pump