F81
'' TEMPERATURE
SENSOR DEVIATION
TEST WAITING''
Turn off electric
ity
and waiting 5 minutes.
Turn on electric
ity
and check the
fault is
disappeared
.
If not, Supply/return or dhw
temperature sensor cables may
be
not
mounted, or there may be a loose contact.
Check the cable.
Fix them if not
mounted, replace
them if there is any
damage.
Check whether any problem
on temperature sensors.
(Resistance Check)
Replace sensors in
case of any problem.
Replace
main
board.
NO
YES
YES
NO
42
