Mitsubishi Electric PUHZ-W50VHA Service Manual page 95

9-8. FUNCTION OF SWITCHES
PUHZ-W50VHA(-BS)
PUHZ-W50VHAR1(-BS)
PUHZ-W50VHAR2(-BS)
PUHZ-W50VHAR3(-BS)
Switch
Function
Mark No.
Manual
1
defrost
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 For high humidity
selection
SW6
3–6
Model Setting 2
SW10 1,2
1=ON, 0=OFF
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 . Manual defrost should be done as follows.
Change the DIP SW1-1 on the outdoor controller board from OFF to ON.
1
Manual defrost will start by the above operation
2
• Heat mode setting
• 10 minutes have passed since compressor starts operating or previous manual defrost is finished.
• Pipe temperature is less than or equal to 8
Manual defrost will finish if certain conditions have been satisfied.
Manual defrost can be done if above conditions have been 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.
OCH439M
PUHZ-W85VHA(-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
Standard
SW5 SW6
Model
4 3 4 5 6
W50VHA
0 1 1 0 0
W50VHAR1
W50VHAR2
1 1 1 0 0
W50VHAR3
W85VHA 0 1 0 1 0
W85VHAR1 0 1 0 1 0
Energy saving
Powerful mode
mode
Do NOT use PUHZ-W50,85VHA
Separate power Outdoor unit power
supply supply
.
:
Default
setting
Switch ON to force defrosting
OFF
Switch ON to clear (erase) the
following:
(1) Check codes and Suspension
OFF
flags in RAM
(2) Check 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
1 2
0 1
As shown in
0 1
the left table
0 0
0 1
OFF
OFF
Power supply connection method
OFF
selection
if these conditions written below are satisfied.
1
95
Effective timing
Function details
When compressor
is working in
heating mode.
Off or operating
–
–
ON for other models
Make sure to set
– SW6-3 to 6 and
SW10-1,2 correctly
–
–
When power supply
(SW1, 8)/
Note (SW6)
*1
–
Always
Always
–
–
Always
–
ON