DuraChill DCA203C4, Operator'S Manual, Page: 26 / 43

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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
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 the 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
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)
Fault
— External temperature control probe has failed for more than
4 seconds. Compressor, heater, fan, and pump are turned off.
Replace external probe or operate instrument using internal
temperature probe. Contact service representative if fault persists.
13
Communications fault
Fault –
Internal electronics failure. Power to compressor, heater, fan,
and pump are turned off. Contact service representative.
14
ADC fault, internal probe
Fault –
ADC for internal probe faulty. Power to compressor, heater,
fan, and pump are turned off. Contact service representative.
15
ADC fault, external probe
Fault –
ADC for external probe faulty. Power to compressor, heater,
fan, and pump are turned off. Contact service representative.