MXS Service Manual

SiUS121736EA Forced Cooling Operation
Trial Operation and Field Settings 222
2. Forced Cooling Operation
Outline The forced cooling operation is allowed when both the following conditions are met.
1. The outdoor unit is not abnormal and not in the 3-minute standby mode.
2. The outdoor unit is not operating.
Protection functions have priority over all other functions during forced cooling operation.
Procedure 1. Turn off the power.
2. Remove the service lid (2 screws).
3. Remove the service monitor PCB switch cover (1 screw).
4. Switch SW5 and SW6 to off.
5. Turn the operation mode switch (SW2) to COOL.
6. Screw the service monitor PCB switch cover back on (1 screw).
7. Turn on the power.
8. Push the forced operation switch (SW1) above the service monitor PCB cover. (The operation
will start.)
→ Forced cooling operation will stop automatically after about 10 minutes.
To stop the operation, push the forced operation switch (SW1).
Service monitor PCB
HEAT
COOL
4
3
2
1
2
1
E
D
C
B
A
2
1
ON OFF
4
3
ON OFF
2
1
HEAT
COOL
Operation mode switch (SW2)
SW6
SW5
COOL
4
3
2
1
2
1
E
D
C
B
A
Screw
Remove
the switch
cover.
•Turn off all the switches of
SW5 and SW6.
Forced operation ON/OFF
switch (SW1)
(R24623)