1 minute read
Fault diagnosis using the module timer
4 Troubleshooting
Module timer
(Order No.: 22 1000 30 34 00)
The current fault is displayed as “AF” and is always written in memory position F1. Preceding faults are moved to the memory locations F2 – F5, if necessary the contents of memory position F5 is overwritten.
Please note!
• Not only the defective component, but also a defective current circuit results in a fault being displayed. • In heaters with connected air pressure sensor the modular timer cannot be used to perform diagnoses. The diagnostics unit or the EDiTH diagnostics tool must be used to perform the diagnosis.
The fault memory of the „air pressure sensor“ can be read out using the EDiTH diagnostics tool only. • Fault code, fault description, cause / remedial action are described on Pages 23 – 27. a –Time p –Preset c – Heat e –Reverse f – Forward
Query fault memory F1 – F5
Condition: The heater is switched off.
• Press c key –> the heater is switched on.
• Press a key and keep pressed, then press p key within 2 seconds.
Display is as follows: AF = current fault 3 digit number = fault code c flashes.
• Press f key once or several times, fault memory positions F1 – F5 are displayed.
Cancel the control box lock and simultaneously delete the fault memory
Condition: An electrical connection exists from terminal 15 (ignition) to the module timer, 12-pin connector, chamber 10.
• Press c key
Display is as follows: the current fault F15 or F50.
• Press button a, keep it depressed and then press button p within 2 seconds.
The module timer is now in the “Query fault memory” program.
• Switch off ignition (terminal 15).
• Simultaneously press button a and button p, in addition, switch on the ignition (terminal 15) and wait until the following appears in the display.
After ignition “ON” the following appears in the display:
Display flashes, Heater symbol does not flash
• Switch the heater off and on –> the control box is unlocked, the heater restarts.
After switching the heater off and on and renewed query of the fault memory, the following appears in the display:
Display flashes, Heater symbol does not flash
