Test Operation; Operation Of The Unit; Maintenance And Service; Maintenance Introduction - Daikin KHRQ23M29H Installationsanleitung

Correcting after abnormal completion of the test operation
The test operation is only completed if there is no malfunction code
displayed on the remote controller. In case of a displayed malfunction
code, perform the following actions to correct the abnormality:
Confirm the malfunction code on the remote controller
Installation error Error code
The stop valve of an
E3
outdoor unit is left
E4
closed.
F3
F6
UF
The phases of the
U1
power to the outdoor
unit is reversed.
No power is supplied
LC
to an outdoor or
U1
indoor unit (including
U4
phase interruption).
Incorrect
UF
interconnections
between units.
Refrigerant
E3
overcharge.
F6
UF
Insufficient refrigerant.
E4
F3
In case the test
U3
operation was
interrupted or the unit
was operating out of
the instructed
temperature range,
the initial refrigerant
detection has failed.
After correcting the abnormality, press the BS3 RETURN button
and reset the malfunction code.
Carry out the test operation again and confirm that the
abnormality is properly corrected.
Refer to the installation manual of the indoor unit for other
detailed codes.
15. O
PERATION OF THE UNIT
Once the unit is installed and test operation of outdoor unit and
indoor units is finished, the operation of the unit can start.
For operating the indoor unit, the remote controller of the indoor unit
should be switched ON. Refer to the indoor unit operation manual for
more details.
REYAQ10~16P7Y1B
VRVIII system outdoor unit
4PW62582-1A – 08.2011
Remedial action
Open the stop valve.
Exchange two of the three phases
(L1, L2, L3) to make a positive
phase connection.
Check if the power wiring for the
outdoor unit is connected correctly.
Check if the refrigerant piping and
the unit wiring are consistent with
each other.
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.
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.
In case the the test operation was
interrupted, perform the test
operation again.
Perform the test operation again
within the instructed temperature
range.
Test run is possible for ambient
temperatures between –20°C and
35°C.
16. M
AINTENANCE AND SERVICE

16.1. Maintenance introduction

In order to ensure optimal operation of the unit, a number of checks
and inspections should be carried out on the unit at regular intervals,
preferably yearly.
This maintenance shall be carried out by the installer or service
agent.

16.2. Service precautions

DANGER: ELECTRICAL SHOCK
See "2. General Safety precautions" on page 2.
CAUTION
when performing service to inverter equipment
1 Do not open the electric component box cover for 10
minutes after the power supply is turned off.
2 Measure the voltage between terminals on the
terminal block for power supply with a tester and
confirm that the power supply is shut off.
In addition, measure the points, as shown in the figure
below, with a tester and confirm that the voltage of the
capacitor in the main circuit is less than 50 V DC.
A2P A2P
TP1 TP2
3 To prevent damaging the PC-board, touch a non-
coated metal part to eliminate static electricity before
pulling out or plugging in connectors.
4 Pull out junction connectors X1A, X2A, X3A, X4A
(X3A and X4A of REYAQ14+16 are inside the electric
component box (2), refer to the wiring diagram) for the
fan motors in the outdoor unit before starting service
operation on the inverter equipment. Be careful not to
touch the live parts.
(If a fan rotates due to strong wind, it may store
electricity in the capacitor or in the main circuit and
cause electric shock.)
5 After the service is finished, plug the junction
connecter back in. Otherwise the error code E7 will be
displayed on the remote controller and normal
operation will not be performed.
For details refer to the wiring diagram labelled on the back
of the electric component box cover.
Pay attention to the fan. It is dangerous to inspect the
unit while the fan is running. Be sure to turn off the main
switch and to remove the fuses from the control circuit
located in the outdoor unit.
NOTICE
Play it safe!
For protection of the PCB, touch the switch box casing by
hand in order to eliminate static electricity from your body
before performing service.
A1P
A3P
Installation manual
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