Cleaning And Maintenance; Troubleshooting; Firmware Version - Dometic TwinBoost4000 Installation And Service Manual

Cleaning and maintenance

➤ Clean the device according to fig. z, page 8.
➤ Never use detergents containing chlorine for cleaning and disinfec-
tion.
➤ Perform self-cleaning once a week: See chapter "Self-cleaning" on
page 12.
➤ If side cowl is positioned below a window: Check window switch
operation as a pre trip or seasonal check.
➤ Check regularly, especially after long journeys, that the cowl and the
exhaust duct are intact and correctly fixed.
➤ Operate the safety and drain valve regularly, at least twice a year, to
remove limescale deposits and ensure proper function.
➤ Have the device, its gas supply and ducting for the products of com-
bustion checked by an expert in accordance with national regulations
(e.g. in Germany every 2 years). If no national regulations exist that
should be done at least every 2 years. The inspection must be certified
on a test certificate (e.g. DVGW Work Sheet G 607 for vehicles in Ger-
many).
Self-cleaning
To clean the system against bacteria operate the device for a few minutes
at the highest temperature level for self-cleaning:
1. Set room temperature to max. value.
2. Choose auto mode for air heating.
3. Choose hot mode for water heating.

Troubleshooting

Firmware version

➤ Read out the firmware versions of the display (HMI) and of the device
according to fig. A, page 8.
Routine in case of a gas leak (smell of gas)
➤ Avoid ignition sources. Immediately extinguish all naked flames.
Do not operate electrical switches or devices such as radio or mobile
phone. Do not start the vehicle engine. Do not smoke.
1. Open all windows and doors.
2. Evacuate all persons from the vehicle.
3. If possible, close the gas cylinders from the outside.
4. Have the entire gas system checked and, if necessary, repaired by
qualified personnel.
5. Only then put the gas system back into operation.
Default routine for trouble shooting
Only execute the default routine if it is proposed in the error code table.
1. Wait 3 minutes, then restart.
2. If the device does not operate properly contact the manufacturer's
support.
Contacting the manufacturer's support
See back page of this manual.
12
Error code table
Error
Cause
code
002 Battery voltage low
003 Battery voltage high
005 Fuse blown
007 General system error
008 Communication error
Air pressure sensor error ➤ Execute the default routine.
403
404 Circulation air tempera-
ture sensor error
406 Water temperature
sensor error
408 Room temperature
sensor error
409 Air heater flame sensor
error
410 Water heater flame
sensor error
411 Combustion fan error
Circulation blower error ➤ Execute the default routine.
412
413 Air heater gas valve 1
error
414 Air heater gas valve 2
error
415 Water heater gas valve
error
416 Master gas valve error
417 Gas valve relay error
418 Air heater start error
419 Water heater start error
420 Air heater flame out
421 Water heater flame out
422 Air heater overheat
4445103144
Remedy
1. Check battery voltage and compare
them to under voltage setting.
2. Charge battery.
3. Connect vehicle to AC power.
4. If none above solves the issue contact
the manufacturer's support.
1. Check battery voltage and ensure it is
less than 16.5 V.
If battery voltage is higher than 16.5 V
either a wrong battery is connected or
battery is broken.
2. Replace battery with battery that sup-
plies DC power according to techni-
cal data (see data plate).
3. In case vehicle is connected to AC
power check if battery is charging.
4. If battery is charging check charging
voltage (must be lower than 16.5 V to
assure proper function whilst
charging).
1. Check DC power fuses (chapter
"Replacing fuses" on page 11).
2. If device does not operate properly
contact the manufacturer's support.
➤ Contact the manufacturer's support.
➤ Execute the default routine.
➤ Execute the default routine.
➤ Execute the default routine.
➤ Execute the default routine.
➤ Execute the default routine.
➤ Execute the default routine.
➤ Execute the default routine.
➤ Execute the default routine.
➤ Execute the default routine.
➤ Execute the default routine.
➤ Execute the default routine.
➤ Execute the default routine.
➤ Execute the default routine.
➤ Execute the default routine.
➤ Execute the default routine.
➤ Execute the default routine.
1. Assure that air heater is switched off.
2. Wait 15 – 30 minutes until device has
cooled down.
3. Check if all air inlet grilles and the
cabin air ducting to the device are not
blocked.
4. Restart air heater.
5. If device does not operate properly
contact the manufacturer's support.
EN