ESH150
–3PE~400V
Service manual
40/56
Ref. NR-000144-ENG
Heaters
WARNING!
Before attempting to fix any kind of malfunction, make sure that no buttons
are lit on the electrical panel, that the power switch is in the OFF position and that the
unit is disconnected from the power supply.
Never open the electrical console when the
unit is connected to the power supply.
Heaters can reach high temperatures. Always wait
until they have cooled down before handling them.
NOTE:
The thermostat is a safety device which is in contact
with the heater.
If the temperature exceeds 120ºC (248º) the
thermostat will cut off the power supply to the temperature
regulator.
The thermostat will not start working again until
the temperature of the heater falls below 120ºC (248ºF).
If the temperature of either heater (isocyanate or polyol) exceeds
90ºC (194ºF) an alarm will activate, and the corresponding
number will appear on the control panel (5 for isocyanate and 6 for
polyol).
Follow the procedure below, in the sequence given, to rectify the
problem and avoid expensive repairs. Check that all automatic
switches are in the correct working position before proceeding to
locate faults.
PROBLEM
SOLUTIONS
The heater does not heat up, although the LED in the heater button is lit.
1-2-3
The symbol (---) appears on the heater display.
4
SOLUTIONS
1. Heating elements
Each heater contains two 900 W or 1500 W heating elements, connected in parallel and
delivering a total heating power of 1800 W or 3000 W. If a heater fails to reach the required
temperature after
two or three minutes, it’s possible that one of its two elements is faulty.
