Specifications
Table Of Contents
- Cover
- Table of Contents
- Part 1 General Information
- Part 2 Specifications
- Part 3 Refrigerant Circuit
- Part 4 Function
- Part 5 Test Operation
- Part 6 Troubleshooting
- Part 7 Appendix
- 1. Piping Diagrams
- 2. Wiring Diagrams for Reference
- 3. List of Electrical and Functional Parts
- 4. Option List
- 5. Piping Installation Point
- 6. Example of connection (R-410A Type)
- 7. Thermistor Resistance / Temperature Characteristics
- 8. Pressure Sensor
- 9. Method of Checking the Inverter’s Power Transistors and Diode Modules
- Part 8 Precautions for New Refrigerant (R-410A)
- Index
- Drawings & Flow Charts

Test Operation Si34-704
134 Test Operation
[How to Check How Many Units are Connected]
It is possible to find out how many indoor or outdoor unit in the system are turned on by
operating the push button on the PC-board (A1P) of outdoor unit (In case of multi system
master unit).
Follow the procedure below to check how many indoor or outdoor units are turned on.
Note:
Press the “MODE button” (BS1) if you get confused while operating.
This returns to Setting Mode 1 (default).
(LED display:
3
...OFF
4
...ON
5
...Blinking
∗
...Uncertain)
LED display
H
1
P
H
2
P
H
3
P
H
4
P
H
5
P
H
6
P
H
7
P
1.
Press the MODE button (BS1) once, and set the MONITOR MODE
(H1P: Blinking).
5333333
2.
Press the SET button (BS2) the number of
times until the LED display matches that at
right.
For checking the
number of outdoor units:
eight times
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For checking the
number of indoor units:
five times
5333434
3.
Press the RETURN button (BS3) and read the number of units from the
display of H2P through H7P.
[Reading Method]
The display of H2P through H7P should be read as a binary number,
with
5
standing for “1” and
3
standing for “0”.
5 ∗∗∗∗∗∗
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4.
Press the MODE button (BS1) once. This returns to Setting Mode 1
(default).
3343333
Ex: For the LED display at right, this would be “010110”,
which would mean 22 units are connected.
Note: “000000” indicates 64 units.
32 × 0 + 16 × 1 + 8 × 0 + 4 × 1 + 2 × 1 + 1 × 0 = 22 units