Fujitsu WOYA060LFCA, Инструкция по установке и эксплуатации, Страница: 28 / 92

3 .4 .6 Pump down operation (Refrigerant collecting
operation) outdoor unit
"
Ensure that the general electrical power
supply has been cut off before starting any
repair work.
"
stored energy: after disconnecting power
supplies wait 1 minute before accessing the
internal parts of the equipment.
Perform the following procedures to collect the
refrigerant.
-
1
- Turn OFF the start/stop switch
(ref. 3 , figure 8, page 11 ). Disconnect the outdoor
units power supply.
-
2
- Remove the front panel. Open the power control
box. Then turn ON the DIP SW1 on the interface
board,
-
3
- Reconnect the power supply. Turn ON the start/
stop switch.(Green and Red LED on the board start
flashing ; 1 sec. on / 1 sec. off repeated). The outdoor
unit begins cooling operation about 3 minutes after
switching ON
-
4
-
Rapidly
: Set the parameter
7700
(
Relay output
QX1 ) to
ON
. => The pump works normally.
Reminder: Press
OK
Hold on the key for 3s
and select the level of access* used with the aid
of the knob Confirm with the key
OK
* Choose “Specialist” level / Inputs / outputs test.
-
5
- Close the liquid valve on the outdoor unit 30 s
maximum after operation starts.
-
6
- Close the gas valve on the outdoor unit as soon as
the pressure is lower 0,02 bar relative reading on the
Manifold or 1-2 minutes after closing the liquid valve,
while the outdoor unit keeps running.
-
7
- Disconnect the power supply.
- 8 - The refrigerant collecting operation is over.
Remarks:
- The pump down operation cannot be activated even if
DIP SW1
is changed while heat pump's power is
ON
- Do not forget to turn back
DIP SW1
on the interface
board to OFF , after the pump down operation has
been completed.
- Select the "AUTO" heating mode.
- When the pump down operation is repeated,
temporarily turn OFF the start/stop switch after opening
the closed valves (both liquid and gas).
Interface card
LED2
(green)
LED1
(red)
OFF ON
figure 24 - Location of DIP switches and LED
on the hydraulic unit interface card
Installation and operation manual "1764 - EN"
Air to Water Heat Pump, split system
- 28 -