Honeywell HCU 23 Installation And Operation Manual page 25

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Problem/
Display
No display
(year) flashes
Cause
Setpoint adjuster not
connected properly
No power to storey
controller HCE 40
Power failure
Setpoint adjuster
disabled. Operation not
possible
Unit defective
Help with problems
Remedy
Connect setpoint
adjuster correctly.
Connect HCE 40 to
voltage supply
or
Check voltage
supply.
Set time after
changing the
batteries.
Enable setpoint
adjuster.
Inform dealer.
23

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