Sinclair SDV 6 Service Manual page 72

8.1.11 b11, b13 - Error in 1# electronic expansion valve coil, error in 2# electronic expansion valve coil
Error display
Error impact
Error trigger
Error recovery
Possible cause
Troubleshooting
Digital display
The faulty IDU stops. Other IDUs of the same system: operate normally.
ODU of the same system: operate normally.
The IDU main control board cannot detect the feedback signal from the electronic expansion valve
coil for no less than 4 seconds.
After the unit is powered on again, the main control program detects a feedback signal from the
electronic expansion valve.
 The electronic expansion valve coil plugged into the EEV port in the IDU main control board
is loose.
 The IDU main control board is damaged.
The electronic expansion valve coil is faulty.

 The electronic expansion valve coil is short circuited or disconnected.
b11/b13 (1)
electronic expansion
valve coil plugged into the
EXV port in the IDU main
control board
loose?
No
Check the
electronic expansion valve
Is the coil abnormal
No
Check
the electronic
expansion valve
Is the coil adapter
short circuited or
disconnected
No
Replace the main control
board of the IDU
Is the
Yes
Yes
(2)?
Yes
(3)?
Display position
Panel, display box, and wired controller
Reconnect the plug tightly
Replace the electronic
expansion valve coil
Replace the adapter
69