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Heating - Mitsubishi Electric PUHZ-SW50VHA Service Manual

Split-type, air to water heat pump
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10-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS
(1) Function of switches
Type of
Switch No.
Switch
1
2
Abnormal history clear
3
SW1
4
DIP
Refrigerant address setting
switch
5
6
1
SW4
2
Push
SWP
switch
1
2
Power failure automatic recovery *
SW5
3,4,5
6
1
2
Max Hz setting (cooling)
3
4
SW7*
Max Hz setting (heating)
4
Breaker capacity setting *
5
6
1
2
DIP
SW8
switch
3
1
2
6
SW9*
3,4
1
2
3
4
SW6
5
6
7
8
6
SW5
Manual defrost should be done as follows.
1
*
1 Change the DIP SW1-1 on the outdoor controller board or switch 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 are satisfied.
Manual 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
'Power failure automatic recovery' can be set by either remote controller or this DIP SW. If one of them is set to ON, 'Auto recovery' acti-
*
vates. Please set 'Auto recovery' basically by remote controller because all units do not have DIP SW.
Also, once it is set, 'Auto recovery' will not be deactivated even setting the DIP SW to OFF. To deactivate, set the DIP SW to OFF, and turn
the power OFF and ON again, then also set "NO FUNCTION" on remote controller. Please refer to the indoor unit installation manual.
SW7-1 is setting change over of Demand/Low noise. It is effective only in case of external input.
3
*
(Local wiring is necessary. Refer to the next page: Special function)
Please do not use SW7-3 to SW7-6 usually. Trouble might be caused by the usage condition.
*
4
With this switch setting, the capacity decreases up to 30% under peak load condition. Thus this setting is recommended only for Air to
*
5
water purposes.
6
SW40/50VHA ONLY
*
OCH525C
Function
Manual defrost *
1
No function
No function
Pump down
No function
2
No function
Model select
Mode select *
3
No function
Max Hz (cooling) o 0.8
Max Hz (heating) o 0.8
5
Defrost setting
No function
No function
No function
No function
Function switch
No function
Model select
The black square ( ) indicates a switch position.
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
3
4
Start
Auto recovery
No auto recovery
Following SW5-6 reference
Demand function
Low noise mode
16A
For high humidity
Valid
MODEL
SW6
ON
40
OFF
1 2 3
4
5
6
7 8
ON
50
OFF
1 2 3
4
5
6
7
8
The black square (
) indicates a switch position.
46
Effective timing
OFF
When compressor is working
Normal
in heating operation. *
Normal
OFF or operating
ON
1 2 3 4 5 6
2
When power supply ON
ON
1 2 3 4 5 6
5
Normal
Under suspension
When power supply ON
Always
Normal
Always
Normal
Always
25A
When power supply ON
Normal
Always
Normal
Always
SW5-6
ON
OFF
1 2 3 4 5 6
ON
OFF
1 2 3 4 5 6
1

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