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If a fault should occur, the left display will show Ft, and the right display will show one of the fault codes shown
below.
Fault Code Description Action Required
02
Low limit temperature
alarm
Alarm — Process fluid temperature is below the low temperature
limit value for more than 25 seconds. Compressor, heater, and fan
are turned OFF; pump remains ON.
To clear the fault, turn the unit off then on using the front panel Power
Button, and decrease the LL value.
03
High limit temperature
alarm
Alarm — Process fluid temperature is above the high temperature
limit value for more than 25 seconds. Compressor, heater, and fan
are turned OFF; pump remains ON.
To clear the fault, turn the unit off then on using the front panel Power
Button, and increase the HL value.
04
Over-temperature alarm
— Process fluid temperature is above Chiller’s factory set high
temperature safety cutoff. Heater, compressor, and fan turned OFF;
pump remains ON.
Lower process temperature.
05
Low liquid level alarm
(select models only)
Delayed Alarm — Activated when the liquid level in the reservoir
falls below an acceptable level for over 40 seconds. Compressor,
heater, fan, and pump are turned OFF.
Add fluid to reservoir.
07
Low flow alarm
Alarm — Flow rate has dropped below minimum flow rate setting for
more than 10 seconds. Compressor, heater, fan, and pump are
turned OFF. Note: Disabled during first 2 minutes of operation.
Correct cause of low flow rate or decrease minimum flow rate setting.
08
High pressure alarm
Alarm — Fluid outlet pressure has exceeded high-pressure limit
value for over 10 seconds. Compressor, heater, fan, and pump are
turned OFF.
Decrease outlet pressure by removing blockage or increase high-
pressure limit value.
09
Internal software fault
— One or more settings are out of range. Compressor, heater,
fan, and pump are turned OFF.
Default unit to °C or °F; if fault persists, contact service
representative.
10
Electronic power
component fault (Triac)
Fault — Heater triac has failed for more than 10 seconds.
Compressor, heater, fan, and pump are turned OFF.
Contact service representative.
11
Internal probe fault
Fault — Main temperature control probe has failed for more than 4
seconds. Compressor, heater, fan, and pump are turned OFF.
Contact service representative.
12
External temperature
probe fault
(select models only)
— External temperature control probe has failed for more than
4 seconds. Compressor, heater, fan, and pump are turned OFF.
Replace ambient tracking probe or operate instrument using internal
temperature probe. Contact service representative if fault persists.
18
Input – Out of Range
4-20 mA Option — Input for temperature set point too high or too
low.
Correct input or switch to standard control.
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