CombiMaster 230V Series
– User and Installation Manual
23
7 TROUBLESHOOTING
If you cannot solve a problem using the fault finding table, contact your supplier or Mastervolt. Make sure you have the part
and serial number at hand.
Malfunction
Possible cause
What to do
No output voltage
and/or current
No AC input
Check AC wiring, check remote control panel.
AC input out of range
Check input voltage.
AC input frequency out of range
Check input voltage.
Thermal fuse has tripped
Check the load and reset the fuse (see section
6.5).
Overheating error
Check whether the air flow of the CombiMaster is
blocked or the ambient temperature is too high.
Reduce the connected load and let the
CombiMaster cool down.
External breaker (RCD/GFCI) has tripped
Check the external breaker at the AC output (if
applied).
Inverter is off
Check the main switch or the remote setting of the
Inverter button.
Output voltage too low,
charger supplies
maximum current
Load connected to the batteries is larger
than charger can supply.
Reduce load taken from the batteries.
Batteries not 100% charged
Measure battery voltage. After some time this will
be higher.
Wrong setting of the charge voltage
Check settings (see chapter 5).
Charge current too low
Batteries almost fully charged
Nothing, this is normal when the battery is almost
fully charged.
High ambient temperature
Nothing; if ambient temperature is more than the
setting limit, the charge current is automatically
reduced.
Low AC input voltage. At lower AC input
voltages the charge current is reduced.
Check AC input voltage.
Batteries not fully
charged
Charge current too low
See “Charge current too low” in this table.
Current to load is too high
Reduce load taken from the batteries.
Charge time too short
Use a battery charger with higher capacity.
Battery temperature too low
Use the battery temperature sensor.
Defective or old battery
Check battery and replace if necessary.
Wrong setting of the charge voltage
Check settings (see chapter 5).
Battery low causing
CombiMaster shutdown
Discharged battery
Connect AC input to recharge battery
Note:
when charging an empty battery from a
different power source, like an alternator, the
CombiMaster must be reset manually by switching
the main switch off and on again.
Batteries are
discharged too fast
Battery capacity reduced due to wastage or
sulphation, stagnation
Charge and recharge a few times, this might help.
Check battery and replace if necessary.
Batteries are too warm,
gassing
Defective battery (short circuit in cell)
Check battery and replace if necessary.
Battery temperature too high
Use the battery temperature sensor.
Charge voltage too high
Check settings (see chapter 5).
No remote control
display function.
Display is switched off.
Switch on display, refer to display manual.
Error in the CZone/MasterBus wiring.
Check the CZone/MasterBus cables.
Slow or no remote
control communication.
Error in the CZone/MasterBus wiring.
Check the CZone/MasterBus cables.
No terminator placed at the ends of the
CZone/MasterBus network.
Check if a terminator is placed on both ends of the
network.
CZone/MasterBus network is configured as
a ring network.
Ring networks are not allowed. Check the
connections of the network.