Mitsubishi Electric PUHZ-W50VHA Service Manual page 56

8-8. FUNCTION OF SWITCHES
PUHZ-W50VHA(-BS)
Switch
Function
Mark No.
Forced
1
defrosting
To clear error
2
history
SW1
3 No function
4 No function
5 No function
6 No function
Max. fan step
1
selection
Max. frequency
2
SW5
selection
3 No function
4 No function
1 Model Setting 1
Defrost control
2
selection
SW6
3~6
Model Setting 2
SW10 1,2
Energy saving
1 Mode selection
2 No function
Separate
SW8
Interface/Flow
3 temp. control-
ler-outdoor unit
power supplies
<Important Note>
All these dip switches on PUHZ-W50,85VHA are set as shown above.
Spare PCBs, however, will be supplied without any settings, which means that all dip switches are switched OFF.
When servicing, please make sure to set all switches correctly, referring to the previous PCB which is removed from the unit.
*1. Forced defrosting should be done as follows.
1 Change the DIP SW1-1 on the outdoor controller board from OFF to ON.
2 Forced defrosting will start by the above operation
• Heat mode setting
• 10 minutes have passed since compressor starts operating or previous forced defrosting is finished.
• Pipe temperature is less than or equal to 8
Forced defrosting will finish if certain conditions are satisfied.
Forced defrosting can be done if above conditions are satisfied when DIP SW1-1 is changed from OFF to ON.
After DIP SW1-1 is changed from OFF to ON, there is no problem if DIP SW1-1 is left ON or changed to OFF again.
This depends on the service conditions.
PUHZ-W85VHA(-BS)
Selection
ON (with) OFF (without)
ON to start Usual setting
ON to clear Usual setting
Do NOT use PUHZ-W50,85VHA
Do NOT use PUHZ-W50,85VHA
Do NOT use PUHZ-W50,85VHA
Do NOT use PUHZ-W50,85VHA
STEP 9 STEP 8
Middle level Low level
Do NOT use PUHZ-W50,85VHA
Do NOT use PUHZ-W50,85VHA
Do NOT use PUHZ-W50,85VHA
For high
Standard
humidity
SW6 SW10
Model
3 4 5 6 1 2
W50 1 1 0 0 0 1
W85 1 0 1 0 0 0
1=ON, 0=OFF
Powerful mode
mode
Do NOT use PUHZ-W50,85VHA
Separate Outdoor unit power
power supply supply
: .
Initial setting* Function details
Switch ON to force defrosting
OFF
Switch ON to clear (erase) the followings:
(1) Error codes and Suspension flags in RAM
OFF
(2) Error codes and Suspension flags in
EEPROM
OFF
OFF
OFF
OFF
OFF Selection of max. fan step at the silent mode
Selection of max. compressor frequency at
OFF
the silent mode
OFF
OFF
PCB may be damaged, if switch is ON.
OFF
Switch ON to change conditions (standard /
OFF
high himidity) to start defrosting
As shown in
the left table
OFF
OFF
OFF Power supply connection method selection
1 if these conditions written below are satisfied.
56
Effective timing
(SW1, 8) /
Note (SW6)
When compressor
is working in heat-
ing mode. *1
Off or operating
–
–
ON for other mod-
Make sure to set
SW6-3 to 6 and
SW10-1,2 correctly
–
–
–
When power supply
–
Always
Always
–
els
–
Always
–
ON