Mitsubishi Electric Mr.Slim PUHZ-SHW80VHA Service Manual page 59

9-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS
(1) Function of switches
Type
No.
Function
of Switch
switch
1
Forced defrost 1
2
Abnormal history clear
3
4
SW1
Dip
Refrigerant address
switch
setting *2
5
6
1
Test run
SW4
2
Test run mode setting
1
Use of existing pipe
2
SW8
No function
Separate indoor/outdoor
3
unit power supplies
Push
SWP
Pump down
switch
*1 Forced defrost should be done as follows.
1 Change the DIP SW1-1 on the outdoor controller board from OFF to ON.
2 Forced 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 forced defrost finished.
• Pipe temperature is less than or equal to 8:.
Forced defrost will finish if certain conditions are satisfied.
Forced defrost 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.
*2 When the air to water system is used, up to 6 refrigerant address (0 to 5) can be assigned.
OCH526
Action by the switch operation
ON
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
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
8 9
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
12 13
Operating
Heating
Used
—
Used
Start
59
The black square (
OFF
Normal
Normal
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
2 3
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
6 7
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
10 11
ON ON
1 2 3 4 5 6 1 2 3 4 5 6
14 15
OFF
Cooling
Not used
—
Not used
Normal
■
) indicates a switch position.
Effective timing
When compressor is working
in heating operation. 1
off or operating
When power supply ON
Under suspension
Always
—
When power supply ON
Under suspension