FXII Chiller Revision: 05 March 25, 2013 5
System Status Screen
AC Line voltage High Freon Pressure Switch
(CLosed or OPen)
System Current Low Freon Pressure Switch
(CLosed or OPen)
System Frequency Flow Switch
(CLosed or OPen)
Viewing System Status
In the ON state, press and hold the Mode select button for three seconds. The
display will indicate AC line voltage, System current, AC Line frequency, and High and
Low pressure switch status and Flow switch status. After one minute without a button
press, the display will return to the operating screen.
Viewing Fault History
Fault message history may be viewed by pressing and holding the service button
for three seconds with the display in the operating screen. Scroll from message to
message by tapping the up and down buttons. The past eight fault messages, numbered
from 1 to 8 can be viewed with the most recent numbered 1. Multiple faults of the same
type will not be listed separately unless they occur more than one hour from the first
fault. To clear the history log, the screen must show the operate screen. Press and hold
the service button for 10 seconds. The history log will appear then the displayed fault will
disappear indicating the log is cleared.
Fault Messages
The following fault messages will be shown on the display in the event of a
problem. Compressor and electric heat operation is prevented for two minutes after a
fault occurs. Following this two minute period, the control will restart in the last mode of
operation. Pressing the on / off button twice will return the display to the operating screen
but operation will not resume for two minutes. Repeated faults are an indication of a
problem and should be checked by a qualified service person.
LOCKOUT Four of the same faults occurred in less than 1 hour from the first
fault. The display will show the fault that caused the lockout followed by the word
“LOCKOUT”. Press the On/Off button twice on the display to clear a lockout.
HIGH FREON PRESSURE: Indicates the high pressure switch connected to the
High/Low Freon jack is open. If the switch resets, the compressor will restart within two
minutes.
LOW FREON PRESSURE: Indicates low pressure switch connected to the
High/Low Freon jack is open for over 10 minutes. The LP jumper (JP7) on the FX2
power supply must be cut to enable this option.
LOW AC VOLTAGE: The AC line voltage was below the voltage set in the
programmable parameters for more than 10 minutes.
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