JULABO FLW11006 Recirculating Coolers - Manual (Page 29)

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11.5. Error messages
Error messages Description
-01 LOW LEVEL ALARM Low liquid level alarm.
-05 WORKING SENSOR ALARM Working temperature sensor short-circuited or
interrupted.
-03 EXCESS TEMPERATURE WARNING High temperature warning. Starting at 75 °C
(no deactivation)
The return temperature soon reaches the switch-off
value of the high temperature warning function (85 °C)
-07 I 2 C-BUS ERROR Internal error when reading or writing the I 2 C bus.
-08 INVALID COMMAND Invalid command.
-09 COMMAND NOT ALLOWED IN
CURRENT OPERATING MODE
Invalid command in current operating mode.
-10 VALUE TOO SMALL Entered value too small.
-11 VALUE TOO LARGE Entered value too large.
-12 TEMPERATURE MEASUREMENT
ALARM
Error in A/D converter.
-14 EXCESS TEMPERATURE
PROTECTOR ALARM
The return temperature is above the switch-off value of
the high temperature warning function of 85 °C.
Check dimensioning of application.
Use a stronger recirculating cooler if necessary.
-20 WARNING: CLEAN CONDENSOR OR
CHECK COOLING WATER CIRCUIT
OF REFRIGERATOR
Cooling of the condenser is affected. Clean air-cooled
condenser.
Check the flow rate and cooling water temperature on
water-cooled condenser.
-51 PRESSURE SENSOR ALARM LOW
PRESSURE SIDE
 The motor protection switch for the compressor
motor is off. Set motor protection switch to >1< .
Check the fuses.
 The pressure sensor of low pressure side
(evaporation pressure) is faulty, short-circuited or
has a line interruption.
Have the repair done by a specialist.
-52 PRESSURE SENSOR ALARM HIGH
PRESSURE SIDE
 The motor protection switch for the compressor
motor is off. Set motor protection switch to >1< .
Check the fuses.
 The pressure sensor of high pressure side is
faulty, short-circuited or has a line interruption.
Have the repair done by a specialist.
-53 SUCTION GAS TEMPERATURE
SENSOR ALARM
The suction gas temperature sensor is faulty, short-
circuited or has a line interruption.
Have the repair done by a specialist.