Test Operation - Haier 1UH071N1ERG Installation Manual

Form the wires and fix the cover fimmly so that the cover
may be fit in properly.
When you do not use a wire conduit, be sure to protect
the wires with vinyl tubes to revent the edge of the knock-
out hole from cutting the wires.
Follow the electric wiring diagram for electrical wiring
works.
Form the wires and fix the cover fimmly so that the cover
may be fit in properly.
- Do not connect wires of different gauge to the same
power supply terminal. (Looseness in the connection may
cause overheating.)
Use the correct screwdriver to tighten the terminal screws.
Small screwdrivers can damage the screw head and
prevent appropriate tightening.
Over-tightening the terminal screws can damage the
screws.
10.3. Specifications of standard wiring
components
CAUTION
Select all cables and wire sizes in accordance with
applicable legislation.
After finishing the electrical work, confirm that each
electric part and terminal inside the electric part box
is connected securely.
The earth leakage breaker must be a high-speed
type breaker of 30 mA( 0.1 s).

11. Test operation

DANGER
Never leave the unit unattended during installation
or servicing. When the service panel is removed
live parts can be easily touched by accident.
INFORMATION
Note that during the first running period of the unit,
required power input may be higher than stated on the
nameplate of the unit. This phenomenon originates
from the compressor that needs elapse of a 50 hours
run in period before reaching smooth operation and
stable power consumption.
11.1. Pre-run checks
Items to check
Electrical wiring
Inter-unit wiring
Ground wire
Refrigerant
piping
Extra refrigerant
Be sure to perform a test run.
Be sure to fully open the liquid-side and gas-side stop
valves. If you operate the unit with stop valves closed, the
compressor will break down.
Be sure to execute the first test run of the installation in
cooling mode operation.
Never leave the unit unattended with an open front panel
during test run.
11.2. Precautions regarding test-runs
1 In order to detect stop valves failing to open, operation
of the unit is compulsorily performed in cooling for 2-3
minutes during the first test run, even if the remote
controller was set to heating operation. In this case, the
remote controller will have kept displaying the heating
symbol all the time and the unit will switch to heating
operation automatically after elapse of that time.
In case you cannot operate the unit in test run mode
2
for any unusual reason, refer to
at the moment of first installation" .
In case of a wireless remote controller, execute the run
3
only after having installed the indoor unit decoration
panel with infrared receiver first.
In case the panels of indoor units are not yet installed
4
to the indoor units, make sure to shut off the power
supply after finishing the complete test run.
A complete test run surely includes shutting off power
5
after having performed a normal operation stop on the
remote controller. Do not stop operation by turning circuit
breakers off.
19
Is the wiring as mentioned on the
wiring diagram?
Make sure no wiring has been
forgotten and that there are no missing
phases or reverse phases.
Is the unit properly grounded?
Is the wiring between units connected
in series correct?
Are any of the wiring attachment
screws loose?
Is the insulation resistance at leaset
1 ?
- Use a 500V mege-tester when
measuring insulation.
- Do not use a mega-tester for low-
voltage circuits.
Is the size of the piping appropriate?
Is the insulation material for the piping
attached securely?
Are both the liquid and gas pipes
insulated?
Are the stop valves for both the liquid
side and the gas side open?
Did you write down the extra
refrigerant and the refrigerant piping
length?
"11.4. Failure diagnosis