Mitsubishi Electric PUHZ-W85VAA Service Manual page 40

9-7. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS
(1) Function of switches
PUHZ-W85VAA.UK
PUHZ-W85YAA.UK
Type
No.
Function
of Switch
switch
1
Manual defrost *
2
Abnormal history clear
3
4
Refrigerant address
setting
SW1
DIP 5
switch
6
1
No function
SW4
2
No function
1
No function
SW8 2
No function
Separate indoor/outdoor
3
unit power supplies
* 1 Manual defrost should be done as follows.
1 Change the DIP SW1-1 on the outdoor controller board from OFF to ON.
2 Manual defrost will start by the above operation 1 if all these conditions written below are satisfied.
• Heat mode setting
• 10 minutes have passed since compressor started operating or previous manual defrost 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.
OCH681
PUHZ-W112VAA.UK
PUHZ-W112YAA.UK
Action by the switch operation
ON
1 Start
Clear
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
0 1
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
4 5
—
—
—
—
Used
OFF
Normal
Normal
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
2 3
—
—
—
—
Not used
40
Effective timing
When compressor is working
in heating operation.*
off or operating
When power supply ON
—
—
—
—
When power supply ON
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