Daikin VRV W T-series - About Service Mode Operation; To Use Vacuum Mode; To Recover Refrigerant; 10 Troubleshooting

10 Troubleshooting
Installation manual
45
RWEQ96~432TAYCU
VRV W T-Series water-cooled system air conditioner
4P540122-1B – 2018.11
9.4 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35
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.
9.4.1 To use vacuum mode
1 Whentheunitisatstandstill,settheunitin[2-21]=1.
Result: When confirmed, the indoor and outside unit expansion
valves will fully open. At that moment the 7-segment display
indication=
and the user interface of all indoor units
indicate “test operation) and “central control” and the operation
will be prohibited.
2 Evacuate the system with a vacuum pump.
3 Press BS3 to stop vacuuming mode.
9.4.2 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 leakage 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 outside 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.
NOTE
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 outside 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.