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.
7.4 About Test Run
8.1 Overview
8.2 Safety Precautions for
Maintenance
8 MAINTENANCE AND REPAIR
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.
INFORMATION
i
Arrange for the installation personnel or service
agent to carry out one maintenance every year.
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.
Take electrical hazards preventive measures during
system maintenance and repair.
The following procedures describe the test run of the
whole system. This operation checks and determines the
following items:
This chapter contains the following information:
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, MS box
and the indoor units.
§
according to the method in section 6.3.3.
When maintaining and repairing the inverter:
1. Do not open the cover of the electrical component box
within 5 minutes after the power is switched off.
2. Verify that the power supply is switched off before you
use the measuring instrument to measure the voltage
between the main capacitor and the main terminal
ensure that the capacitor voltage in the main circuit is
less than 36 VDC. the position of main terminal have be
shown in the Wiring nameplate
(
The port of CN38 on the
commpressor drive board
)
.
3. Before you come in any contact with the circuit board
or components (including the terminals), make sure that
static electricity in your own body is eliminated. You can
touch the sheet metal of the outdoor unit to achieve this.
If conditions permit, please wear anti-static bracelet.
4. During maintenance, pull out the plug connecting to
the power cord of the fan to prevent the fan from rotating
when it is windy outside. The strong winds will cause the
fan to rotate and generate electricity which can charge
the capacitor or terminals, leading to an electric shock.
At the same time, do take note of any mechanical
damage. The blades of a high speed rotating fan are
very dangerous and cannot be operated by one person
alone.
5. Once the maintenance is completed, remember to
*#*#$#***
be reported for the main control board.
6. When the unit is power on, the fan of the unit with auto
snow-blowing function will run periodically, so make sure
the power supply is off before touching the unit.
Please refer to the wiring schematic on the back of the
box cover of the electrical component box for the
relevant details.
7.7 Operating This Unit
Once the installation of this unit is completed, and the
test run of the outdoor, MS boxes and indoor units is
done, you can start to run the system.
The indoor unit user interface should be connected to
facilitate the operations of the indoor unit . Please refer to
the installation manual of the indoor unit for more details.
INFORMATION
i
Refer to the installation manual of the MS box
and indoor unit respectively for details on other
error codes related to the MS box and indoor
unit.
7.6 Rectifications after Test Run is
Completed with Exceptions
The test run is considered complete when there is no
error code on the user interface or the outdoor unit
display. When an error code is displayed, rectify the
operation based on the description in the error code
table. Try to conduct the test run again to check that the
exception has been corrected.
INFORMATION
i
Before you carry out any maintenance or repair
work, touch the metal parts of the unit to
dissipate static electricity and protect the PCB.
NOTE
8.2.1 Prevent electrical hazards
36
