Mitsubishi Electric PUHZ-W50VHA-BS Service Manual page 80

9-8. FUNCTION OF SWITCHES
PUHZ-W50VHA(-BS)
PUHZ-W85VHA(-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
selection
SW5
3 No function
4 Model setting 3
1 Model Setting 1
Defrost control
2
selection
SW6
3~6
Model Setting 2
SW10 1,2
1 Mode selection
2 No function
Separate
SW8
Interface/Flow
3 temp. controller-
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.
OCH439H
PUHZ-W50VHAR1(-BS)
PUHZ-W85VHAR1(-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
For high humidity Standard
SW5 SW6
Model
4 3 4 5
W50VHA
0 1 1 0
W50VHAR1
W50VHAR2 1 1 1 0
W85VHA 0 1 0 1
W85VHAR1 0 1 0 1
1=ON, 0=OFF
Energy saving
Powerful mode
mode
Do NOT use PUHZ-W50,85VHA
Separate power Outdoor unit power
supply supply
: .
Initial setting*
Switch ON to force defrosting
OFF
Switch ON to clear (erase) the
followings:
(1) Error codes and Suspension
OFF
flags in RAM
(2) Error codes and Suspension
flags in EEPROM
OFF
OFF
OFF
OFF
Selection of max. fan step at the
OFF
silent mode
Selection of max. compressor
OFF
frequency at the silent mode
OFF
Refer to the
table of SW6
PCB may be damaged, if switch is
OFF
ON.
Switches to optimal defrosting
operation for low-temperature and
OFF
high-humidity regions.
SW10
6 1 2
0 0 1
As shown in
0 0 1
the left table
0 0 0
0 0 1
OFF
OFF
Power supply connection method
OFF
selection
1
if these conditions written below are satisfied.
80
PUHZ-W50VHAR2(-BS)
Function details
–
–
–
–
–
Effective timing
(SW1, 8) /
Note (SW6)
When compressor
is working in
heating mode. *1
Off or operating
–
Always
Always
–
ON for other models
–
Make sure to set
SW6-3 to 6 and
SW10-1,2 correctly
Always
–
When power supply
ON