In the event of a malfunction, fuses and electrical connections should be checked for
condition and security.
If this action fails to correct the malfunction, please consult your authorised SPHEROS
dealer.
Following a fault lock-out situation, coded flashing signals will be emitted - via the
operation indicator light - during the after-run period of the heater, on all heaters
equipped with control unit 1572D. These coded flashing signals allow your authorised
SPHEROS dealer to identify the malfunction that has occurred.
Troubleshooting
Heater turns itself off automatically (=fault lock-out)
Fault code display
Fault codes on the display of the combination or standard digital timer
On heaters equipped with control unit 1572D and standard digital timer, a fault code
appears on the display of the digital timer whenever a malfunction has occurred.
Deactivating the heater lock-out mode:
Deactivation of the heater lock-out mode is effected by switching the heater on and
then disrupting the power supply during the start-up procedure.
In the case of heaters operated by a switch, the particular type of malfunction that
has occurred is indicated by coded flashing signals via the operation indicator light
during the after-run period of the heater. After every fast pulse sequence
comprising 5 signals, the long flashing signal pulses can then be counted: The
coded flashing signals correspond to the numbers in the table below:
Subject to modification
Operating and
service instructions
Cause
Remedy
NOTE:
Combustion was not established
during start-up
Flame extinguishes during operation
Heater is shut down due to overheating,
e.g. owing to lack/loss of coolant
Vehicle voltage insufficient
Combustion air and/or
exhaust gas ducts obstructed
Switch heater briefly off and on again
one time
Switch heater briefly off and on again
one time
Top up coolant and press the push-
button on the temperature limiter
NOTE
Some heater applications are equipped
with an automatic reset.
:
Charge battery
Switch heater briefly off and on again
one time
Check combustion air and exhaust gas
ducts for unobstructed passage
!
No start
Flame failure
Undervoltage or overvoltage
Stray light detection during the prestart or after-run period
Defective flame detector
Defective temperature sensor
Defective solenoid valve
Defective fan motor
Defective circulation pump
Defective temperature limiter/overheating
Defective ignition spark transmitter
Fault lock-out condition due to recurring malfunctions or repeated
flame failure (8x no start-up or 5x flame failure)
F 01
F 02
F 03
F 04
F 05
F 06
F 07
F 08
F 09
F 10
F 11
F 12
Thermo
230/300/350
