LG ACHH Series Manual page 59

Error number Errors
Load water pump inter-
11
locking error
n Failure diagnosis method
Has the pump
interlocking error happened
before occurrence?
[Note 1]
No
Is pump interlocking input
normally input? [Note 2]
Yes
After making a
terminal UI6,G
of a chiller board short,
[Note 3]is a green signal
occurred on a pump
interlocking input of HMI
system status screen?
[Note 4]
Yes
Confirm the connection status
of a chiller board and terminal
holder by referring to a
connection map
[Note 4] Confirm whether or not a pump interlock "ON"
signal are occurred normally.
When the pump contact input is off for 3 sec-
onds when starting or during operation and
this condition occurs 3 times within one hour,
or pump contact input is off for more than 9
After treating the
Yes
error, is it finally removed
by pressing a reset button
of HMI?
Yes
Request a repair in order to
No
have a normal contact
point output signal of a
pump
No
Chiller board replacement
Meaning
seconds.
Remove the previously
No
occurred error by pressing
a reset button of HMI
[Note 1] Since previously occurred error is not removed
in case of not pressing the reset button of HMI, the
error should be removed by pressing the reset button
for sure in case of occurring a pump interlocking error.
[Note 2] When a pump is operating, confirm an output
signal of a pump coming through UI6,G is in short sta-
tus using a tester.
In case where both ends are not in short status, request
to a person in charge of facility as a problem of a pump
output
[Note 3] Both ends short like a figure below
- 59 -
Error code check
Main cause of occurrence
- Contact defect of a contact point
- External pump defect
- Connection defect
- In case where a reset button is not
pressed after occurring the pump
interlocking previously
UI6,G Pump Interlock