ERQ100~140A7V1B
Inverter condensing unit
4PW51321-1
Installation manual
18
5
Measure to be taken when operation finishes abnormally
1.
Confirm the error code on the remote controller.
2.
Correct what is abnormal.
(See the installation manual and operation manual or
contact your dealer.)
3.
After the abnormality is corrected, press the
button and reset the error code.
4.
Start the unit again to confirm that the problem is properly
solved.
5.
If no error code is indicated on the remote controller, it is
possible to start operation after 5 minutes.
Error codes on the remote controller
12.5. Checks in normal operation
In case of wired remote controllers
■
After the check operation, "CHANGEOVER UNDER CONTROL"
is blinking in the connected remote controller.
■
Select an air handling unit to be used as the master unit.
■
Press the operation mode selector button in the remote
controller of the air handling unit selected as the master unit.
■
In that remote controller, "CHANGEOVER UNDER CONTROL"
disappears. That remote controller will control changeover of the
cooling/heating operation mode.
12.6. Temperature adjustment operation confirmation
After the test run is over, operate the unit normally. (Heating is not
possible if the outdoor temperature is 24°C or higher.)
■
Make sure the air handling and outdoor units are operating
normally (If a knocking sound can be heard in the liquid
compression of the compressor, stop the unit immediately and
then energize the heater for a sufficient length of time before
restarting the operation.)
■
Check to see if cold (or hot) air is coming out of the air handling
unit.
13. S
ERVICE
MODE
OPERATION
After turning on the power supply, the unit can not be started until the
H2P initialisation led, indicating that the unit is still under preparation,
goes off (maximum 12 minutes).
Vacuuming method
At the first installation, this vacuuming is not required. It is required
only for repair purposes.
1
When the unit is at a standstill and under the setting mode 2, set
the required function B (refrigerant recovery operation/
vacuuming operation) to
(ON).
-
After this is set, do not reset the setting mode 2 until the
vacuuming is finished.
-
The H1P led is on and the remote controller indicates
(test operation) and
(external control) and the
operation will be prohibited.
2
Vacuum the system with a vacuum pump.
3
Press the
button and reset the setting mode 2.
Refrigerant recovery operation method by a refrigerant
reclaimer.
1
When the unit is at a standstill and in setting mode 2, set the
required function B (refrigerant recovery operation/vacuuming
operation) to
(ON).
-
The air handling unit and the outdoor unit expansion valves
will fully open and some solenoid valves will open.
-
The H1P led is on and the remote controller indicates
(test operation) and
(external control) and the
operation will be prohibited.
2
Recover the refrigerant using a refrigerant reclaimer. For details,
see the operation manual delivered with the refrigerant
reclaimer.
3
Press the
button and reset the setting mode 2.
Installation error
Malfunction
code
Remedial action
The stop valve of
an outdoor unit is
left closed.
E3
Open the stop valve on both the gas
and liquid side.
The stop valve of
an outdoor unit is
left closed.
E4
F3
Open the stop valve on both the gas
and liquid side.
Insufficient
refrigerant
Check if the additional refrigerant
charge has been finished correctly.
Recalculate the required amount of
refrigerant from the piping length and
add an adequate amount of refrigerant.
Refrigerant
overcharge
E3
F6
Recalculate the required amount of
refrigerant from the piping length and
correct the refrigerant charge level by
recovering any excessive refrigerant
with a refrigerant recovery machine.
Insufficient supply
voltage
U2
Check if the supply voltage is supplied
properly.
The check
operation is not
performed.
U3
Perform the check operation.
No power is
supplied to the
outdoor unit.
U4
Check if the power wiring for the
outdoor unit is connected correctly.
Improper type of
air handling units
are connected.
UA
Check the type of air handling units that
are currently connected. If they are not
proper, replace them with proper ones.
The stop valve of
an outdoor unit is
left closed.
UF
Open the stop valve on both the gas
and liquid side.
The piping and
wiring of the
specified air
handling unit are
not connected
correctly to the
outdoor unit.
Confirm that the piping and wiring of the
specified air handling unit are
connected correctly to the outdoor unit.
Incorrect
interconnections
between units.
UH
Connect correctly the interconnections
between units to the F1 and F2 (TO
IN/D UNIT) terminals on the PC board
in the outdoor unit.
Power supply
cables are
connected in the
reverse phase
instead of the
normal phase.
U1
Connect the power supply cables in
normal phase. Change any two of the
three power supply cables (L1, L2, L3)
to correct phase.
BS3 RETURN
Cautions for normal operation check
■
Once stopping, the compressor will not restart in
about 5 minutes even if the Run/Stop button of an air
handling unit in the same system is pressed.
■
When the system operation is stopped by the remote
controller, the outdoor units may continue operating
for a further 1 minute maximum.
■
After the test run, when handling the unit over to the
customer, make sure the electric box lid, the service
lid and the unit casing are all attached properly.
CAUTION
Never turn the power of the outdoor unit OFF while the
refrigerant is being recovered.
If the power is turned OFF, the solenoid valves are closed
and the refrigerant cannot be recovered from the outdoor
unit.
ON
BS1 MODE
ON
BS1 MODE
