Display, Alarm and Error Messages
When an alarm or error condition is detected, Ft appears on the Pressure/Flow Rate Display and a
corresponding code flashes on the Temperature Display. Operational limit parameter alarms will shut down the
compressor, fan, pump, and heaters. Alphabetical codes will also appear on the Temperature Display. An audio
alarm will also sound.
After taking corrective action, restart the Chiller to clear the fault or error.
Code Description Action Required Default
02
Low limit temperature alarm
Alarm – Process fluid temperature has dropped
below the low limit temperature setting.
Increase heat load or decrease LL setting.
39°F (4°C)
03
High limit temperature alarm
Alarm – Process fluid temperature has reached the
high limit temperature setting.
Decrease heat load or increase HL setting.
95°F (35°C)
04
Over-temperature alarm
(select models only)
Alarm – Process fluid temperature is above the
factory set high temperature cutout.
Air-cooled units: Cutout will reset automatically after
the temperature of the fluid is lowered.
Water-cooled units: Reset cutout manually by
pressing red button on rear of unit after the
temperature of the fluid is lowered.
Units without
heater option
“OPT”
jumpered on
PCB
05
Low liquid level alarm
(units with Liquid Level Float
Switch option only)
Delayed Alarm – Activated when the liquid level in the
Reservoir falls below an acceptable level for 30
seconds.
Wired in series with mechanical flow switch; see 07
low flow alarm.
See Fuse Bit
settings
07
Low flow alarm
Alarm – Flow rate has dropped below minimum flow
rate setting.
Correct low flow condition or decrease FL setting.
Secondary: Mechanical flow switch closes with flow
(~4 gpm / 15 lpm minimum). If installed in
combination with optional liquid level float switch,
they are wired in series and both must be closed. If
either is open due to low flow or low liquid level, this
alarm or EFL will be activated. See EFL.
~4 gpm
(15 lpm)
minimum
required for
flow switch
08
High pressure alarm
Delayed Alarm – Activated when the fluid outlet
pressure has exceeded the high pressure limit setting
for 30 seconds.
Decrease outlet pressure or increase FP setting.
100 psi
(689 kPa)
09
Internal software fault
10
Triac fault
Fault – Default unit to °C or °F. If fault persists,
replace Control PCB.
Note: Some parameters will reset to default values;
this could activate another fault code. Review and
return all parameters to user settings.
N/A
110-279 31
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