Function Of Switches - Mitsubishi Electric PUHZ-SHW230YKA2 Service Manual

8-8. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS

Function of switches

Type
No.
Function
of Switch
switch
1
Manual defrost*
2 Abnormal history clear
3
SW1
4
Refrigerant address
setting
5
DIP
switch
6
1 Test run
SW4
2
Test run mode setting
1
No function
Setting of short pipe
2
SW8
connection
3
No function
Push
SWP
Pump down
switch
* 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 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.
OCH594B
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
3 4
Note: Up to 6 refrigerant address can be assigned.
Operating
Heating
—
Used
—
Start
The black square ( ) indicates a switch position.
OFF
Normal
Normal
ON
1 2 3 4 5 6
2
ON
4 5 6 1 2 3 4 5 6
5
OFF
Cooling
—
Not used
—
Normal
38
Effective timing
When compressor is working
in heating operation.*
1
OFF or operating
When power supply ON
Under suspension
—
When power supply ON
—
Under suspension
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