V18.4
Art. No: MH-BA-25
Page 21
•
Earth-leakage switch cannot
be switched on
•
STB defective
•
Heating rods defective
•
Check or replace STB
•
Check or replace
heating elements
•
Target temperature
not
visible
•
Room thermostat
bridge is missing
•
Target temperature is
controlled via room
thermostat
•
Check whether there is a
bridge for room thermostat
•
Check room thermostat
setting.
4.2 Error code table for MHRE control unit
Troubleshooting may only be carried out by qualified personnel
Error code on display
Cause
Remed
y
•
C1
•
Short-circuit in
temperature
sensor
•
Contact mobiheat
•
C2
•
A system error has occurred
•
Contact mobiheat
•
C3
•
A system error has occurred
•
Contact mobiheat
•
O1
•
Cable break
•
Temperature sensor is not
connected or defective
•
Contact mobiheat
•
O3
•
A system error has occurred
•
Contact mobiheat
•
Pf
•
The boiler is not sufficiently
vented, the LED
"Boiler ventilation" lights
up red
•
Close the ball valves with
thermometer handle for
return and flow
•
Bleed the unit. See Section
3.3.2
•
The power supply is faulty.
The
"U<"
LED lights up
•
Have the on-site power
supply checked by a
specialist.
•
Contact mobiheat
