Sinclair SDV 6 Service Manual page 60

8.1.2 A11 - R32 refrigerant leaks, requiring shutdown immediately
Error display
Error impact
Error trigger
Error recovery
Possible cause
Troubleshooting
Digital display
 Faulty IDU: The fan operates at the highest speed, the EEV is closed (Note: Fault persists
after power on again), and buzzer of the display control board of the faulty IDU and buzzer of
wired controller connected to the faulty IDU keep beeping.
Other IDUs of the same system: Refrigerant is recycled to ODU. After recycling is completed,

other IDUs stop running, displaying code "A51" - ODU fault
ODU of the same system: It stops running after recycling is completed, displaying code "A11" - IDU
refrigerant leaks.
When the IDU main control board receives a refrigerant leakage signal from R32 refrigerant
detection device (See Figure 1 below)
Has not detected the refrigerant leak signal and has received the signal of refrigerant fault
rectification
 R32 refrigerant of IDUs leaks.
R32 refrigerant sensor is damaged or contaminated with external foreign matter (e.g. steam,

oil)
 The IDU main control board is damaged.
A11
Are
there any R32 refrigerant
leaks in the pipes?
No
Replace
the main control board of
the IDU.Is the fault
cleared?
No
R32 refrigerant sensor has
been damaged or contaminated by
external foreign matter
No
Contact the technical
support personnel of your
dealer
Display position
Panel, display box, and wired controller
Yes
Follow the instructions of
Note (1)
Yes
Fault cleared
Yes
Replace R32 refrigerant
sensor
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