Technical information

Portable Chillers UGH024/1103
5-6 MAINTENANCE
PLC CONTROL
ENTERING
MAINTENANCE
SCREENS
The Maintenance screens are
password protected. You
must have clearance to enter
and change settings on these
screens.
If the control buttons are not
used for 5 minutes, the PLC
defaults to the Temperature/
Setpoint screen. You must
then re-enter the password to
use the Maintenance
screens.
Use the Maintenance screens to view cycling information. the
cycle screens display the total cycles or hours since the initial
assembly of the chiller. These numbers are only reset through
the Conair screens by Conair Service personnel. To view the
cycle information:
Press the Setup arrow.
Press the Scroll arrows to scroll through the
Setup screens. Stop when you get to the Maintenance
screen:
2
1
STATUS SETUP RUN ALM
Press arrow
Press the Maintenance arrow.
The password screen displays. Use the keypad to enter
the maintenance password, 999, then press the Enter but-
ton.
Scroll through the Maintenance screens.
They include:
l Cycle screens - view the cycle times for
chiller components
l Tuning screens - initiate PID auto tune
sequence for the hot gas bypass control for the compres-
sor
l Compressor service screen - (dual compressor mod-
els only) choose the lead compressor (1 by default), and
take a compressor in or out of service (IN by default)
l Conair factory screen - (unavailable to user)
Press the Escape/Previous Screen button
to exit the Maintenance screens and return to the
main screen. The password stays in effect for 5 minutes
after using it; after 5 minutes the screens return to the
Maintenance
3
4
5
Press arrow