Mitsubishi Electric PUHY-P168, Service Handbook, Page: 370 / 404

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[
X
LED monitor display on the outdoor unit board ]
X LED monitor display on the outdoor unit board [1] How to read the LED on the service monitor
1. How to read the LED
By setting the DIP SW 1-1 through 1-10 (Switch number 10 is represented by 0), the operating condition of the unit can be
monitored on the service monitor. (Refer to the table on the following pages for DIP SW settings.) The service monitor uses
4-digit 7-segment LED to display numerical values and other types of information.
Pressure and temperature are examples of numerical values, and operating conditions and the on-off status of solenoid
valve are examples of flag display.
1) Display of numerical values
Example: When the pressure data sensor reads 18.8kg/cm
2
(Item No. 72)
Œ
The unit of pressure is in kg/cm
2
ΠUse the following conversion formula to convert the displayed value into a value in SI unit.
Value in SI unit (MPa) = Displayed value (kg/cm
2
) x 0.098
Œ
Use the following conversion formula to convert the displayed value into a value in SI unit.
Value in SI unit (MPa) = Displayed value (kg/cm
2
) x 0.098
ΠBy setting DIP SW5-3 on the outdoor unit controller board to ON, values can be displayed in English measurement
units.
2) Flag display (Each set of 2 lines in vertical alignment indicates a flag.)
Example: 3-minutes restart mode (Item No. 14)
2. LED display at initial setting
From power on until the completion of initial settings, the following information will be displayed on the monitor screen.
(Displays No. 1 through No. 4 in order repeatedly.)
After the initial settings have been completed, the information on these items can be checked by making the switch setting
that corresponds to No. 517 in the LED display table.
No SW1 Item Display Remarks
1
N/A
Software version
[0103] : Version 1.03
2
Refrigerant type
[ 410] : R410A
3
Model and capac-
ity
[H-20] : PUHY 20HP
[r-08] : PURY 8HP
4
M-NET address
[ 51] : Address 51
7SEG LED
LD1 LD2 LD3 LD4 LD5 LD6 LD7 LD8