Log sheets are available in pads of 50 sheets and can be obtained through the nearest Johnson
Controls office.
Figure 14: Chiller log sheets
Note: A pad of 50 log sheets can be ordered from your local Johnson Controls branch by
requesting Form 160.88-MR1.
An accurate record of readings serves as a valuable reference for operating the system. Readings
taken when a system is newly installed establish the normal conditions with which to compare later
readings.
For example, an increase in condenser approach temperature (discharge saturation temperature
minus outside ambient air temperature) may be an indication of dirty condenser coils.
Fault shutdowns
The chiller is programmed to shut down on two kinds of fault conditions:
• A Cycling fault allows the chiller to automatically restart when the condition clears. There are a
few cycling faults that become safety faults if they happen three times in a prescribed period of
time. See fault messages tables for further details.
• A Safety fault requires the cause for the condition be determined and resolved before
restarting. When a safety fault occurs, press the Clear Faults button on the panel home screen
to restart the chiller. When the condition is cleared and the Clear Faults button is pressed, the
chiller restarts unless the local Stop button was pressed, or the remote run command ceased.
Note: Some safety faults require the chiller state to be not running for them to be reset.
Performing prolonged shutdown
If the chiller must be shut down for an extended period of time, for example, over the winter
season, use the following procedure:
• Test all system joints for refrigerant leaks with a leak detector. If any leaks are found, they must
be repaired before allowing the system to stand for a long period of time. During long idle
periods, check the tightness of the system periodically.
• Power to the chiller must remain energized so that the UPS panel can maintain the battery
health during the prolonged idle period. This prevents battery failure.
35YVAM with OptiView Control Center
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