Heidolph Rotacool - Manual (Page 11)

11
E
TROUBLESHOOTING
Have any work required on the electrical, electronic and refrigerating
components performed only by suitably qualified professionals.
In the case of a malfunction, the unit will display a flashing error message on the screen.
During error message output, the unit will switch between displaying the error message and
the actual value of the flow temperature. An overview of possible error messages follows:
Display text Cause Action
E1

Pump motor overheating

Missing or too little cooling
liquid

Cooling liquid frozen

Switch off main switch

Wait until pump motor is cool
(duration up to 1 hour)

Switch on main switch

Refill cooling liquid

Briefly switch main switch off
and on

Wait until cooling liquid has
thawed (duration up to 24
hours)

Briefly switch main switch off
and on
H2o

Missing or too little cooling
liquid

Cooling liquid frozen

Refill cooling liquid

Briefly switch main switch off
and on

Wait until cooling liquid has
thawed (duration up to 24
hours)

Briefly switch main switch off
and on
(The flow temperature
flashes on the
display) Warning:
Over-or under-temperature
(limits +/- 2 K from the
setpoint) The regulator continues operation
In the case of error messages ‘E2’, ‘E3’, ‘EP’ or ‘F1’, please contact Heidolph
Instruments or your local Heidolph Instruments Dealer.