Thermo 230/300/350
13
Troubleshooting
13.1. Fault lock-out
If there are any faults, proceed as follows:
Switch off the heater and then switch it on again.
If the heater doesn't start, check the following:
– Is the fuel supply ok?
– Is a sufficient amount of fuel in the tank?
– Are the fuses ok?
– Are the electrical connections and cables in order?
– Are the combustion- and exhaust air ways free of obstructions?
13.2. Error Code Output (heaters with control unit 1572D)
When equipped with a standard timer an error code readout appears on
the display of the timer after a malfunction.
NOTE:
When the heater is operated by means of a switch the type of error is
output during heater run-down via a flash code of the operating indicator
light. After five short signals the long flash pulses are counted. The flash
pulses correspond to the error number in the following table:
F 01
no start
F 02
flame-out *
F 03
low voltage or excess voltage
F 04
foreign light detected during run-up and run-down
F 05
flame sensor defective
F 06
temperature sensor defective
F 07
solenoid valve defective
F 08
fan motor defective
F 09
circulation pump defective **
F 10
temperature limiter defective / overheating
F 11
igniter box defective
F 12
error lockout due to repeated malfunction or repeated flame-out
(8x no start-up or 5x flame-out)
*
A response of the overheat thermostat will be stored in the control
unit as a flame-out (F 02) (Thermo 231 and 301).
**
The error 09 is indicated only if the heater is equipped with a circu-
lation pump monitoring (see table below).
Table: Programmed SG1572D with circulation pump monitoring
EOL-Data record for SG 1572D
Circulating pump monitoring
EOL-
Data record
Yes
63317F
63860E
67980D
X
96774B
97805C
97807C
X
97809C
X
97811B
X
97813A
97815A
Troubleshooting
Ctr. device
programmed
No
67981D
97810C
97810C
97812A
63