Operating instructions

6.2.1 Reading a Fault Code with 1531 “Comfort” Timer
Installed
Where the Thermo 230/300 installation includes the model 1531
“Comfort” Digital Timer, you will be able to read the current failure fault
code directly from the timer display. The flame indicator symbol will
“flash” the present fault code once and will then convert the fault code
to an alphanumeric display message.
For example: fault code 10 (overheat) will be visible on the timer
display as “F 10".
Once the failure has been corrected, and the heater switch or timer is
cycled ”OFF" and “ON” and the heater successfully starts and runs
with no further failures, the error code will disappear from the timer
display.
6.2.2 Storing a Fault Code in Memory
Once the Thermo 230/300 completes the after run (cool down) period
initiated by a failure event, the current flash code will be downloaded
(stored) in memory.
The Thermo 230/300 can store up to ten fault codes.
Once the memory is “full”, any additional fault code will replace the
earliest code stored thereby continually updating the fault codes
stored in memory with the four most recent faults.
CAUTION
Troubleshooting requires
profound knowledge about
structure and theory of
operation of the heater
components and may only
be performed by skilled
personnel.
NOTE
After any correction of a
defect a functional test has
to be performed in the
vehicle.
6 Basic Troubleshooting Thermo 230/300
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