Pump Down Operation - Daikin 2MXS-N Series Service Manual

Pump Down Operation

1. Pump Down Operation

Pump Down In order to protect the environment, be sure to conduct pump down operation when relocating or
disposing the unit.
Operation
1. Remove the valve caps from the liquid stop valve and the gas stop valve.
2. Carry out forced cooling operation.
3. After 5 ~ 10 minutes, close the liquid stop valve with a hexagonal wrench.
4. After 2 ~ 3 minutes, close the gas stop valve and stop the forced cooling operation.
Forced cooling
operation
Procedure
Command frequency
Ending conditions
178
Gas stop valve
Liquid stop valve
1. Turn the power off.
2. Remove the switch cover.
3. Turn off all the switches of SW5 and SW6 on the service monitor PCB.
4. Set the operation mode switch (SW2) to COOL.
5. Screw the switch cover again.
6. Turn the power on.
7. Wait until the 3-minute standby mode finishes.
8. Press the forced cooling operation ON/OFF switch (SW1).
18 class: 52 Hz
24/36 class: 30 Hz
1. Press the forced cooling operation ON/OFF switch (SW1) again.
2. The operation ends automatically after 11 ~ 15 minutes (depending on the
model).
COOL
Close
Hexagonal wrench
Valve caps
Service monitor PCB
Remove
E the switch
D
2 cover.
4
C
1
E
3
B Screw D
C
2
B
A
A
1
2
1
4
3
2
1
COOL HEAT
Trial Operation and Field Settings
SiUS121502E
(R14566)
•Turn off all the switches of
SW5 and SW6.
ON OFF
2
SW6
1
ON OFF
4
3
SW5
2
1
Operation mode switch (SW2)
COOL HEAT
Forced cooling operation
ON/OFF switch (SW1)
(R22273)