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CombiMaster 120V Series – User and Installation Manual
8 TROUBLESHOOTING
If you cannot solve a problem using the fault-finding table, contact your Mastervolt dealer. 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 (< 75VAC)
Check input voltage.
AC input frequency out of range
Check input frequency.
Thermal breaker has tripped
Check the load and reset the fuse (see
section 6.6).
Overheating error
Check whether the air flow of the
CombiMaster Inverter/Charger is blocked
or the ambient temperature is too high.
Reduce the connected load and let the
CombiMaster Inverter/Charger cool
down.
External breaker or GFCI (RCD)
has tripped
Check the external breaker at the AC
output (if applied).
Inverter is off
Check the "On/Charge only"-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.
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).
