Mitsubishi Electric PUHZ-SW100VHA, Service Manual

Page: 52 / 80

52
10-8. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS
(1) Function of switches
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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 compulsory defrosting 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.
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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’ activates. Please set “Auto recovery” basically by remote controller because all units do not have DIP SW.
Please refer to the indoor unit installation manual.
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3 SW7-1,2 are used for demand control. SW7-1,2 are effective only at the demand control.
(Refer to next page : Special function (b))
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4 Please do not use SW7-3~6 usually. Trouble might be caused by the usage condition.
1 2 3 6 4 7 4 5 8
OFF
ON
75VHA
1 2 3 6 4 7 4 5 8
OFF
ON
100VHA
1 2 3 4 5 6
OFF
ON
MODEL SW6 SW5-6 MODEL SW6 SW5-6
1 2 3 4 5 6
OFF
ON
1 2 3 6 4 7 4 5 8
OFF
ON
120VHA
1 2 3 4 5 6
OFF
ON
1 2 3 6 4 7 4 5 8
OFF
ON
100YHA
1 2 3 4 5 6
OFF
ON
1 2 3 6 4 7 4 5 8
OFF
ON
120YHA
1 2 3 4 5 6
OFF
ON
1
2
3,4,5
6
3
4
5
6
1
2
3
1
2
3,4
1
2
3
4
5
6
7
8
6
ON OFF
No.
Function Effective timing
Action by the switch operation
No function
Power failure
automatic recovery *2
No function
model select
No function
Defrost setting
Use of existing pipe
No function
No function
No function
Function switch
No function
Switch
SW5
SW7
*4
Dip
switch
SW8
SW9
SW6
SW5
Type of
Switch
—
Auto recovery
—
—
For high humidity
Used
—
—
—
Valid
—
—
No auto recovery
—
—
Normal
Not used
—
—
—
Normal
—
—
When power supply ON
—
Always
—
Always
Always
—
—
—
Always
—
Setting of demand
control
*3
Breaker size setting
*Only SW75
1
2
SW7-1 SW7-2
OFF 0% (Operation stop)
75%
50%
OFF
ON
OFF
OFF
ON
Power consumption
(Demand switch ON)
SW7 Breaker size
OFF
4
Both for indoor unit
and outdoor unit
Only for outdoor unit
20A
16A
20A
16A
—
25A (Default)
ON
OFF
OFF
5
ON
ON
Model select
Following SW5-6 reference
Dip
switch
Push
switch
SW1
1
2
Forced defrost *1 Start Normal
When compressor is working
in heating operation. *1
Abnormal history clear
Refrigerant address
setting
When power supply ON
Clear Normal Off or operating
SWP
6
5
4
3
Under suspension
Pump down Start Normal
SW4
1
2
Test run Operating OFF
Under suspension
Test run mode setting Heating Cooling
1 2 3
0 1 2
3
4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3 4 5 6
ON
1 2 3
4 5
4 5 6
ON
1 2 3 4 5 6
ON
When power supply ON
The black square ( ) indicates a switch position.
OCH533A