Function Of Switches, Connectors And Jumpers - Mitsubishi Electric PUZ-A18NHA Service Manual

11-10. FUNCTION OF SWITCHES, CONNECTORS AND JUMPERS

(1) Function of switches
Type
No. Function
of Switch
switch
1 Forced defrost
2 Abnormal history clear
3
4
SW1
Dip
Refrigerant address setting
switch
5
6
1
Test run
SW4
2 Test run mode setting
Forced defrost should be done as follows.
1Change the DIP SW1-1 on the outdoor controller board from OFF to ON.
2Forced defrost will start by the above operation 1 if 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: [46˚F].
3Forced defrost will finish if certain conditions are satisfied.
wForced 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.
Type of
No.
Switch
Switch
1
2
automatic recovery w1
SW5
3
4
1
Setting of demand
control
w2
Dip
SW7 2
switch
w3
3
Max Hz setting (cooling)
4
Max Hz setting (heating)
5
Defrost Hz setting
6
1
SW8
2
3
1
SW9
2
Push
SWP
switch
w1 '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.
w2 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))
w3 Please do not use SW7-3~6 usually. Trouble might be caused by the usage condition.
Action by the switch operation
ON
Start
Clear
ON ON
1 2 3 4 5 6
0
ON ON
1 2 3 4 5 6
4
ON ON
1 2 3 4 5 6
8
ON ON
1 2 3 4 5 6
12
Operating
Heating (PUZ only)
Function
No function
Power failure Auto recovery
No function
No function
SW7-1
Max Hz (cooling) o 0.8
Max Hz (heating) o 0.8
Defrost Hz o 0.8
No function
No function
No function
No function
Function switch
No function
Pump down
OFF
Normal
Normal
ON ON
1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6
1 2
ON ON
1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6
5 6
ON ON
1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6
9 10
ON ON
1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6
13 14
OFF
Cooling
Action by the switch operation
ON OFF
—
No auto recovery
—
—
Power consumption
SW7-2
(Demand switch ON)
OFF OFF
0% (Operation stop)
ON OFF 50%
75%
OFF ON
Normal
Normal
Normal
—
—
—
—
Normal
Valid
—
Normal
Start
68
Effective timing
When compressor is working
in heating operation w
Always
3
7
When power supply turned ON
11
15
Operation OFF
Effective timing
— —
When power supply
turned ON
— —
— —
Always
Always
Always
Always
—
—
—
—
—
—
—
—
Always
—
—
Operation OFF