Troubleshooting Guide - Truma Trumatic E 2400 E Gebrauchsanweisung

Troubleshooting guide

Fault
No LED illuminates
after switching on.
The green LED comes on
when the unit is switched
on, but the heater does not
operate.
Red LED flashes 1x per sec.
Red LED flashes 3x per sec.
Approximately 30 seconds
after the heater is switched
on, the red LED illuminates.
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.
– Window above cowl
open (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 infeed 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 unit 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 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.