Troubleshooting Guide - Truma Trumatic E 2400 E Operating And Installation Instructions

Troubleshooting guide

Fault
After switching on
no LED lights up.
After switching on the
green LED lights up,but the
heater is not running.
Red LED flashes 1x per sec.
Red LED flashes 3x per sec.
Approx. 30 sec. after the
heater is switched on, the
red LED comes on.
After operating for a longer
period of time, the heater
switches to failure.
If these actions do not remedy the problem, please contact Truma Service.
18
Cause
– No operating voltage.
– Device fuse or vehicle fuse
defective.
– The temperature setting on
the control panel is lower
than the room temperature
– Open window above cowl
(window switch).
– Undervoltage range
12 V: 10.9 V – 10.5 V,
24 V: 21.8 V – 20.7 V.
– Overvoltage range
12 V: 15.8 V – 16.4 V,
24 V: 31.8 V – 33.1 V.
– Valves in gas supply line
closed.
– Combustion air intake or
exhaust outlet is sealed.
– Warm air outlets blocked.
– Circulated air intake
blocked.
Remedy
– Check 12 V / 24 V battery voltage,
charge battery if necessary.
– Check all electrical plug connections.
– Check fuse of device or vehicle and replace if necessary
(see fuses)
– Select higher room temperature at the control panel.
– Close window.
– Charge battery.
– Check battery voltage and voltage sources such as the
charger.
– Check gas supply and open valves.
– Remove the cowl cover.
– Inspect openings for contamination (slush, ice, leaves, etc.)
and remove contamination if necessary.
– Inspect individual outlet openings.
– Remove blockage from circulated air intake.