Branch Box Unit Operation Monitor Function; Digital Indicator Led1 Working Details - Mitsubishi Electric MXZ-8A140VA Technical & Service Manual

<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
Display detail
(Lighting)
81
Explanation for display
ON
– 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
wOmit 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
1 second
interval
SW2
(Initial setting)
1 2 3 4 5 6
0.5secs. 2 secs.
10
0.5secs. 2 secs.
05
0.5secs. 2 secs.
25
0.5secs. 2 secs.
50
Unit
:
:
Step
code
display
.Hz
Pulse