Mitsubishi Electric PKA-RP1.6GAL Service Technical Manual page 64

9-2. Outdoor unit
9-2-1. Function of switches
Type
No. Function
of Switch
switch
1
Compulsory defrosting
2
Abnormal history clear
3
4
SW1
Dip
Refrigerant address setting
switch
5
6
1 Test run
SW4
2 Test run mode setting
Compulsory defrosting should be done as follows.
1Change the DIP SW1-1 on the outdoor controller board from OFF to ON.
2Compulsory defrosting 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:.
3Compulsory defrosting will finish if certain conditions are satisfied.
wCompulsory defrosting 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 Function
Switch
Frequency setting w1
1
Power failure
SW5
2
automatic recovery w2
3 No function
4 No function
1
Switch to "Low-level
Dip
Sound Priority Mode"
switch
w3
SW7 2
w4
3 Change of the Hz upper limit in cooling
4 Change of the Hz lower limit in heating
5 Change of the Hz in defrosting
6 Change of the percentage to limit the Hz
1 Use of existing pipe
2 Replacement operation
SW8
3 No function
Push
Pump down
SWP
switch
w 1. Do not use only SW5-1 to fix the frequency setting. The compressor operating frequency can be fixed to the desired Hz
by the combination of the SW5-1 setting and optional parts "A Control Service Tool (PAC-SK52ST)" setting.
w 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 don't have DIP
SW. Please refer to mode 01 in the table on page 69.
w 3. SW7-1,2 are used to switch the setting of "Low-level Sound Priority Mode". However, local electrical construction will be
required to make use of this mode. Therefore SW7-1, 2 are effective only when the mode is available for the model.
Refer to 57.
w 4. Do not use SW7 normally, or troubles may be caused by the units' installed condition and used condition.
Action by the switch operation
ON
Start
Clear
ON ON ON
1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6
0 1 2
ON ON ON
1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6
4 5 6
ON ON ON
1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6
8 9 10
ON ON ON
1 2 3 4 5 6 1 2 3 4 5 6 1 2 3 4 5 6
12 13 14
Operating
Heating
Action by the switch operation
ON
Fixed
Auto recovery
—
—
Low-level Sound
1 2 Cooling
Priority Mode
OFF
Regulate max Hz
OFF Mode 1
to spec.
ON
Regulate max Hz
Mode 2
OFF
to spec.
Only TH7 } 30°C
ON
Mode 3
ON regulate max Hz
to spec.
Limited to 85% of the max Hz in cooling
Limited to 85% of the max Hz in heating
Limited to 85% of the max Hz in defrosting
Change of the percentage in case of SW7-3,4 (85% 70%)
Used
Start
—
Start
Effective timing
OFF
When compressor is working
Normal
in heating operation. w
Normal off or operating
ON
1 2 3 4 5 6
3
ON
1 2 3 4 5 6
7
When power supply ON
ON
1 2 3 4 5 6
11
ON
1 2 3 4 5 6
15
OFF
Under suspension
Cooling
Effective timing
OFF
During operation
Normal
(Except 3 minutes after starting.)
No auto recovery When power supply ON
— —
— —
Heating
Regulate max Hz
to spec.
Always
No regulation
Regulate max Hz
to spec.
Normal
Always
Normal
Always
Normal
Always
Normal
Always
Not used
Always
Normal Under suspension
— —
Normal Under suspension
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