Function Of Switches - Mitsubishi Electric PAC-AK50BC Technical & Service Manual

7-3. FUNCTION OF SWITCHES

<Branch box unit operation monitor function>
[When option part 'A-Control Service Tool (PAC-SK52ST)' is connected to branch box controller board (CNM)]
Digital indicator LED1 displays 2 digit number or code to inform operation condition and the meaning of error code by
controlling DIP SW2 on 'A-Control Service Tool'.
Operation indicator SW2 : Indicator change of self diagnosis
SW2 setting
ON
1 2 3 4 5 6
<Digital indicator LED1 working details>
(Be sure that 1 to 6 in the SW2 are set to OFF.)
(1) Display when the power supply is ON.
When the power supply is ON, blinking displays by turns.
Wait for 2 minutes at the longest.
(2) When the display lights (Normal operation)
1The number of connected indoor units to this branch box (0 - 5)
LED1
Pipe temperature / Liquid (TH3)
– 40 - 90
ON
1 2 3 4 5 6
Discharge temperature (TH4)
3 - 217
ON
1 2 3 4 5 6
Output step of outdoor FAN
ON
0 - 15
1 2 3 4 5 6
Unit number of this branch box
ON
1 - 2
1 2 3 4 5 6
Compressor operating frequency
0 - 225
ON
1 2 3 4 5 6
LEV-A opening pulse
0 - 500
ON
1 2 3 4 5 6
OCH508A
Display detail
(Lighting)
17
The black square (
Explanation for display
– 40 - 90
(When the coil thermistor detects 0: or below, "–"
and temperature are displayed by turns.)
(Example)
When –10:; 0.5 secs.
3 - 217
(When the discharge thermistor detects 100: or
more, hundreds digit, tens digit and ones digit are
displayed by turns.)
(Example)
When 105:; 0.5 secs.
1
0 - 15
1 or 2
* Omit the figures after the decimal fractions.
0 - 255
(When it is 100Hz or more, hundreds digit, tens
digit and ones digit are displayed by turns.
(Example)
When 125Hz; 0.5 secs.
1
0 - 500
(When it is 100 pulse or more, hundreds digit, tens
digit and ones digit are displayed by turns.
(Example)
When 150 pulse; 0.5 secs.
1
■
) indicates a switch position.
1 second
interval
SW2
ON
(Initial setting)
1 2 3 4 5 6
0.5 secs. 2 secs.
10
0.5 secs. 2 secs.
05
0.5 secs. 2 secs.
25
0.5 secs. 2 secs.
50
Unit
:
:
Step
code
display
.Hz
Pulse