Fault
Possible Cause
Proposed Fix
Control Panel
Problems
Control Panel has
no display
•
Check batteries and fuses, turn PSU isolate switch
and charger switch on and ensure mains supply is
connected.
•
Check control panel connecting lead at PSU and
behind Control Panel.
•
Contact your Dealer.
12V Power turns
off
•
Battery protect feature has operated to protect
the Vehicle battery and or the Leisure battery.
See page 20
•
Over voltage protection has been activated, the
control panel will display a warning. A number
of things can cause this but the most common is
the solar panel, it is worth checking the regulator
is connected correctly and operating within the
correct parameters.
•
Engine has been started, all equipment has been
disconnected to meet EMC requirements. See
page 15
Control Panel
locked / erratic
function
Observe control panel handling instructions.
Control panel software may have crashed. Reboot
control panel by turning off the PSU isolate switch.
Wait 30 seconds then turn the switch back on. Check
with your dealer that your system has the latest
software installed, as an update may be available.
No 12 volt
output
from PSU
No 230V supply
Check all above.
Charger not
Switched on
Turn charger switch on, switch will illuminate.
Battery not
connected and /
or charged
Install charged battery as per page 19
Power button on
control panel not
switched to on
Turn power on at control panel.
Battery flat /
Battery fuse
blown
Recharge battery, check fuses, check charging
voltage is present at battery.
Fuse blown
Check all fuses are intact and the correct value
fuse is installed as per fuse table.
Equipment
switched off /
unplugged
Check equipment is switched on and connected
to the 12V supply.
Other fault
Contact your Dealer.
Fault
Possible Cause
Proposed Fix
Pump not
working
Fuse blown
Replace fuse with correct value as per fuse table.
Pump turned off
Turn pump on by pressing the pump button at the
control panel.
Lights not
working
Fuse/s blown
Replace fuse with correct value as per fuse table.
Lights turned off
Turn Lights on by pressing the lights button, use
dimmer at the control panel.
Harmony User Guide oduction
059
Harmony - Troubleshooting Guide
59
www.auto-sleepers.co.uk/harmony
58
Harmony - Troubleshooting Guide
Truma Air Conditioning System
Fault Code Possible Cause
Remedy
# 1
Failure (short circuit or
broken cable), room
temperature sensor
Contact Truma Service
# 2
Ice sensor failure –
internal
Inspect the filter and replace it if necessary
# 4
Ice sensor failure –
external (if present)
Keep the air inlets / outlets on the roof free of
obstructions such as leaves
# 24
IR receiver unplugged
or cable broken
Contact Truma Service
