Table des Matières
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Les langues disponibles
Les langues disponibles
Malfunction code
Main
Sub code
code
Master/sub 1/sub 2
01
UH
01
UF
05
16 . Operation of the unit
Once the units are installed and test operation of outdoor units,
Branch Selector units and indoor units are finished, the operation of
the system can start.
For operating the indoor units, the user interface of the indoor units
should be switched ON. Refer to the indoor unit operation manual for
more details.
17 . Maintenance and service
17 . 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.
17 .2 . Service precautions
DANGER: DO NOT TOUCH PIPING AND INTERNAl PARTS
See Safety considerations on page i.
CAUTION
When performing service to inverter equipment:
1 Do not open the control 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 turned off. In addition, measure 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.
REYQ72-168T type
2
+
-
1
1 Terminal block for power supply
2 Tester
3 White connector
41
Contents
Auto address malfunction (inconsistency)
Auto address malfunction (inconsistency)
Stop valves closed.
3
Check if transmission wired unit amount matches with
powered unit amount (by monitor mode) or wait till
initialization is finished.
Check if transmission wired unit amount matches with
powered unit amount (by monitor mode) or wait till
initialization is finished.
Open stop valves.
3 To prevent damaging the printed circuit board, touch a noncoated
metal part to eliminate static electricity before pulling out or plug-
ging in connectors.
4 Pull out junction connectors X1A, X2A (X3A, X4A) 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 connector back in.
Otherwise the malfunction code E7 will be displayed on the user
interface or on the outdoor unit segment display and normal opera-
tion will not be performed.
For details refer to the wiring diagram labelled on the back of the
control box cover.
Pay attention to the fan. It is dangerous to inspect the unit while the
fan is running. Make sure to turn off the main switch and to remove the
fuses from the control circuit located in the outdoor unit.
NOTE
Play it safe. For protection of the printed circuit board, touch the con-
trol box casing by hand in order to eliminate static electricity from your
body before performing service.
17 .3 . Service mode operation
Refrigerant recovery operation/vacuuming operation is possible by
applying setting [2-21]. Refer to 13.2. Operating the push buttons and
DIP switches on the printed circuit board on page 24 for details how
to set mode 2.
When vacuuming/recovery mode is used, check very carefully what
should be vacuumed/recovered before starting. See installation manual
of the indoor unit for more information about vacuuming and recovery.
17 .3 . 1 .
Vacuuming method
1 When the unit is at standstill, set the unit in [2-21]=1.
2 When confirmed, the indoor units, the Branch Selector units and
outdoor unit expansion valves will fully open. At that moment the
segment display indication=t.01 and the user interface of all indoor
units indicate TEST (test operation) and
and the operation will be prohibited.
3 Evacuate the system with a vacuum pump.
4 Press BS3 to stop vacuuming mode.
17 .3 .2 .
Refrigerant recovery operation method
This should be done by a refrigerant recovery equipment. Follow the
same procedure as for vacuuming method.
Solution
(external control)
3P362438-9J
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