York YCUL0020 Installation, Operation And Maintenance Manual page 115

Form 150.63-NM9
Issue date: 5/20/2021
Unit warning
The following messages are not unit safeties and will
not be logged to the history buffer. They are unit warn-
ings and will not auto-restart. Operator intervention is
required to allow a restart of the unit.
! ! L O W B A T T E R Y
C H E C K P R O G / S E T P / O P T N
The Low Battery Warning can only occur at unit pow-
er-up. On micro panel power-up, the RTC battery is
checked. If a low battery is found, all programmed
setpoints, program values, options, time, schedule, and
history buffers will be lost. These values will all be re-
set to their default values which may not be the desired
operating values. Once a faulty battery is detected, the
unit will be prevented from running until the PRO-
GRAM key is pressed. Once PROGRAM is pressed
the anti-recycle timers will be set to the programmed
anti-recycle time to allow the operator time to check
setpoints, and if necessary, reprogram programmable
values and options.
JOHNSON CONTROLS
If a low battery is detected, it should be replaced as
soon as possible. The programmed values will all be
lost and the unit will be prevented from running on the
next power interruption. The RTC/battery (031-02565-
000) is located at U5 on the IPU microboard (031-
02630-000).
! !
This indicates the condensing unit jumbeforeis not in-
stalled between J11-7 and J11-12, on the I/O Board.
This jumbeforemust be installed to operate the con-
densing unit.
SECTION 7 – UNIT CONTROLS
I N C O R R E C T
U N I T T Y P E
7
115