14
8. CHECKS AFTER COMPLETION OF
WORK
After completing the work, make sure to confirm the following
items:
1. Connection of drain piping and removal of transport fittings:
Refer to
“5. CAUTIONS ON INSTALLATION”
.
2. Connection of power supply wiring and tightening of screws:
Refer to
“7-3 Power supply wiring connection procedure”
.
3. Connection of transmission wiring and tightening of screws:
Refer to
“7-4 Transmission wiring connection procedure”
.
4. Freezing connection of refrigerant piping
Refer to
“6. REFRIGERANT PIPING WORK”
.
5. Piping size and heat insulation:
Refer to
“6-1 Selection of piping material”
,
“6-5 Heat insulation
of the piping”
.
6. Check of stop valve:
Confirm that the stop valve is open on both the liquid line and gas
line.
7. Record of amount of additional refrigerant:
Record the amount on the label sticked on the back of the front
panel.
8. Measurement of insulation in main power circuit:
•
Use the megatester for 500 V.
•
Do not use any megatester for low voltage electric circuits except
230 V.
(Wiring between the outdoor unit and the indoor unit)
CAUTION
<To piping technician>
• Make sure to open the stop valve after finishing the piping work.
(Operating the air conditioner with the stop valve shut may damage
the compressor.)
9. TEST OPERATION PROCEDURE
A crankcase heater is mounted for smooth startup. Make sure to
turn on the power 6 hours before starting operation for supplying
the power to the crankcase heater.
WARNING
• Make sure to close the outer panel before leaving the outdoor
unit in the power ON status.
• To avoid injury, always make sure that the circuit breaker on
the power supply panel of the installation is switched off before doing
any work.
Cautions before turning on the power
•
Put the insulating cover securely onto the electric parts box.
•
After turning on the power, check the settings and LED indica-
tors on the PC board (A1P) in the outdoor unit through the
opening of the insulating cover.
9-1 Power on and check operation
• Make sure to perform the check operation after installation. (If the air
conditioner is operated using the indoor remote controller without
performing the check operation, the malfunction code “U3” is dis-
played in the indoor remote controller, and normal operation is dis-
abled.)
• In the check operation, the status of the outdoor unit is checked, and
incorrect wiring is checked for.
Make sure to turn
on the power 6 hours
before starting operation
for supplying the power
to the crankcase heater.
Caution
One outdoor
unit installed
H1P
H5P
H4P
H6P
H7P
H2P
H3P
HAP
Blinking
ON
OFF
LED display:
LED display
(Default
status
before
delivery)
Do not leave any shutoff
valve closed.
Otherwise the compressor
will fail.
SER
VICE
MONIT
OR
MODE
IND
SLA
VE
MASTER
TEST/HWL
C/H
SELE-
CT
OR
L.N.O.P
DEMAND
Close the outer panel
of the outdoor unit.
Turn ON the power
to the outdoor unit
and indoor units.
(1)
(2) Open the outer panel of the outdoor unit.
Check the LED on the PC board (A1P) in
the outdoor unit to see if the data
transmission is performed normally.
(3)
(4) Confirm that the shutoff
valves are open on both the
liquid and gas lines. If they
are closed, open them.
(5)
(6) After the check operation, make sure to close the outside
panel of the outdoor unit.
Caution
The power is
supplied to the
outdoor unit.
Take due care
during the work
to prevent
electric shock.
When performing the
low-noise operation
(L.N.O.P.) or demand
(DEMAND) operation
upon request from the
customer, perform the
setting using the
pushbutton switches
(BS1 to BS5) on the
PC board (A1P) in the
outdoor unit.
Press each
pushbutton switch
from the opening of
the insulation cover.
(Do not remove the
insulation cover.)
The power is supplied to the outdoor
unit. Take due care during the work to
prevent electric shock.
Before using the pushbutton switches
(BS1 to BS5) for setting, confirm that
the microcomputer (SERVICE) monitor
is lit.
For the setting method, refer to the
[Service Precautions] label attached on
the back of the front panel of the
outdoor unit. (Make sure to write the
contents of setting on the [Service
Precautions] label.)
Press and hold the test run
button (BS4) for 5 seconds or
more to start the check
operation.
For the details, refer to the
Check operation method
on the [Service Precautions]
label.
When leaving the outdoor unit during the
check operation for unavoidable reasons,
ask another installation worker to watch the
outdoor unit, or close the outside panel.
The system operates the check operation
for about 15 minutes (30 minutes
maximum), then stops automatically.
The system can start normal operation
about 5 minutes after the check operation if
the remote controller does not display any
malfunction code.
During the check operation, the status
under execution is indicated on the remote
controller.
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