Daikin VRV IV+ RXYTQ8U7YF, Инструкция для установки и пользователя

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10 Troubleshooting
Installer and user reference guide
42
RXYTQ8~16U7YF
VRV IV+ heat pump for high ambient temperatures
4P561157-1 – 2018.09
DANGER: RISK OF BURNING
NOTICE: Risk of electrostatic discharge
Before performing any maintenance or service work, touch
a metal part of the unit in order to eliminate static electricity
and to protect the PCB.
9.2.1 To prevent electrical hazards
When performing service to inverter equipment:
1 Do NOT open the electrical component box cover for
10 minutes after turning off the power supply.
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 points as shown in the figure,
with a tester and confirm that the voltage of the capacitor in the
main circuit is less than 50 V DC.
X3A
8 HP
BLK
RED
X6A (A3P)
10~12 HP
BLK
RED
X6A (A6P) X5A (A3P)
14~16 HP
3 To prevent damaging the PCB, touch a non-coated metal part
to eliminate static electricity before pulling out or plugging in
connectors.
4 Pull out junction connectors X1A, X2A 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
will be displayed on the
user interface or on the outdoor unit 7‑segment display and
normal operation will not be performed.
For details refer to the wiring diagram labelled on the back of the
electrical component 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.
9.3 About service mode operation
Refrigerant recovery operation/vacuuming operation is possible by
applying setting [2‑21]. Refer to
"7.2 Making field settings" on
page 33 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.
9.3.1 To use vacuum mode
1 When the unit is at standstill, set the unit in [2‑21]=1.
Result: When confirmed, the indoor and outdoor unit expansion
valves will fully open. At that moment the 7‑segment display
indication=
and the user interface of all indoor units
indicate TEST (test operation) and (external control) and
the operation will be prohibited.
2 Evacuate the system with a vacuum pump.
3 Press BS3 to stop vacuuming mode.
9.3.2 To recover refrigerant
This should be done by a refrigerant reclaimer. Follow the same
procedure as for vacuuming method.
DANGER: RISK OF EXPLOSION
Pump down – Refrigerant leakage. If you want to pump
down the system, and there is a leak in the refrigerant
circuit:
▪ Do NOT use the unit's automatic pump down function,
with which you can collect all refrigerant from the
system into the outdoor unit.
Possible consequence:
Self-combustion and explosion of the compressor
because of air going into the operating compressor.
▪ Use a separate recovery system so that the unit's
compressor does NOT have to operate.
NOTICE
Make sure to NOT recover any oil while recovering
refrigerant.
Example: By using an oil separator.
10 Troubleshooting
10.1 Overview: Troubleshooting
This chapter describes what you have to do in case of problems.
It contains information about:
▪ Solving problems based on error codes
10.2 Solving problems based on error
codes
In case of a displayed malfunction code, perform correcting actions
as explained in the malfunction code table.
After correcting the abnormality, press BS3 to reset the malfunction
code and retry operation.
The malfunction code which is displayed on the outdoor unit will
indicate a main malfunction code and a sub code. The sub code
indicates more detailed information about the malfunction code. The
malfunction code will be displayed intermittent.
Example:
Code Example
Main code
Sub code
With an interval of 1 second, the display will switch between main
code and sub code.