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7.4 About Test Run
The following procedures describe the test run of the
whole system. This operation checks and determines the
following items:
Check if there is a wiring error (with the
communication check of the indoor unit).
Check if the stop valve is open.
Determine the length of the pipe.
INFORMATION
i
Before you start the compressor, it may take
10 minutes to achieve a uniform cooling
state.
During the test run, the sound of the cooling
mode in operation or the solenoid valve may
become louder, and there may be changes in
the displayed indicators. This is not a
malfunction.
7.5 Test Run Implementation
1. Make sure all the settings you need to configure are
completed. See section 6.2 on the implementation of the
field settings.
2. Turn on the power supply of the outdoor unit and the
indoor units.
INFORMATION
i
Make sure the power supply is turned on 12
hours before operations so that the crankcase
heater is properly energized. This is also to
protect the compressor.
Specific procedures for the test run are as follows:
Step 1: Power on
Cover the lower panel of the ODU, and power on all
IDUs and ODUs.
Step 2: Enter commissioning mode
When the ODU is first powered on, it displays "-. -. -. -."
, which means the unit is not commissioned.
Long
press
the
"DOWN"
simultaneously for 5s on the master ODU to enter
commissioning mode.
Step 3: Set the number of IDUs in a system
The digital display of the master ODU displays "01 01",
where 1st and 2nd digits always on, 3rd and 4th digits
flashing. The 3rd and 4th digits represent the number
of IDUs, the initial value is 1, short press the "DOWN"
or "UP" button to change the number.
Once the number of IDUs has been set, short press the
"OK" button to confirm and automatically proceed to the
next step.
and
"UP"
buttons
49
Step 4: Select the system communication protocol
Enter the communication protocol setting interface, the
digital display of master ODU displays "02 0", where the
1st and 2nd digits always on, the 3rd digit off, the 4th digit
flashing. The 4th digit of the digital display represents the
communication protocol type, the initial value is 0. Short
press the "DOWN" or "UP" button to change the
communication protocol.
If the system is all JR8 IDUs, and the IDUs and ODUs are
connected by PQ communication, please select JR8
protocol RS-485 (P Q) communication, and set the 4th
digit of the master ODU digital display to 0; ODU factory
default JR8 protocol RS-485 (P Q) communication.
If the system has a non-JR8 IDUs, and the IDUs and
ODUs are connected by PQE communication, please
select
the
non-JR8
protocol
communication and set the 4th digit of the master ODU
digital display to 1.
Once the communication protocol has been set, short
press the "OK" button to confirm and automatically
proceed to the next step.
Step 5: IDUs and ODUs address setting
Enter the auto addressing function, the digital display of
master ODU flashes "AU Ad" and "X YZ" in rotation. "AU
Ad" means the auto addressing is in progress, "X"
represents the address of the ODU, "YZ" represents the
number of detected IDUs; the auto addressing takes
about 5-7 minutes, and automatically proceed to the next
step after completion.
Step 6: System initialization
Entering system initialization, the digital display of master
ODU flashes "AU Ad" and "X YZ" in rotation. "INIt"
means initialization is in progress, "X" represents the
address of the ODU, "YZ" represents the number of
detected IDUs; the system initialization takes about
3-5 minutes, and automatically proceed to the next
step after completion.
Step 7: End
After system initialization, if there is no fault in the
system, all ODUs will enter standby mode and the
digital display will display "X YZ" ("X" represents the
address of the ODUs, "YZ" represents the number
of detected IDUs), and the unit can be turned on
normally.
After system initialization, if the ODU detects a fault,
the digital display of master ODU will display "X
YZ" ("X" represents the address of the ODU, "YZ"
represents the number of detected IDUs) and the error
code in rotation. Please refer to the Error Code Table
for troubleshooting, and the unit can be turned on
normally after the fault is cleared.
RS-485
(P
Q
E)
V.1
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