York HIDS006B21S Service Manual page 62

TROUBLESHOOTING
Other
Abnormalities
Event
Insufficient
Cooling
Operation
3-40
Cause
Communication
Failure
between
I.U. and O.U.
Insufficient
Communication
Power
Failure
Supply to
Indoor Unit.
Failure of
Indoor Unit
PCB
Failure of EconoFresh Kit.
Abnormalities of Devices
Check Item
Check indoor unit
indicating alarm code
"03" on wired controller.
Check wired controller
LCD or "RUN" indicator
is turned OFF.
Check that indoor unit
capacity is 0 in
check mode of
outdoor unit PCB.
Check that damper
of EconoFresh Kit
opens and closes.
Action
(Turn OFF Main Switch)
Repair it according
to alarm code "03".
Check indoor unit
according to
"Troubleshooting"
of this manual.
Replace indoor unit PCB.
Replace relay wiring.
Change damper
minimum opening.
SM-18001-rev.1