5.0 Operation
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54
• FET
Overload
–
This fault message indicates the inverter/charger
has shut down because the temperature of the internal FETs (Field Effect
Transistors) started rising abnormally fast. When the FETs have cooled, the
unit will require a manual restart to resume operation.
Remedy:
Allow the inverter to cool down, then press the remote’s
INVERTER ON/OFF pushbutton (manual restart) to resume operation.
If the fault returns, perform an inverter reset (see Section 6.2). If
the fault continues to occur, disconnect all the inverter’s AC output
wires and perform a power reset (Section 6.3). If this fault does not
clear after doing the power reset, the inverter will require service.
Info:
The HBCO value is dependent on your inverter revision and
model. Normally, the HBCO value for ME/MM/RD Series inverters is
preset to 16 VDC (12-volt models) or 32 VDC (24-volt models). The
HBCO value for MS/MMS Series inverters is preset to 17 VDC (12-
volt models), 34 VDC (24-volt models), or 68 VDC (48-volt models).
Remedy:
This fault usually occurs when an external DC source is
charging the inverter’s battery bank. Turn off any other additional
charging source to allow the DC voltage level to drop.
• High
Battery
– The inverter has turned off because the battery voltage
is at a very high level. The fault occurs when the battery voltage is above the
High Battery Cut-Out (HBCO) value. The inverter will automatically restart
and resume operation when the battery voltage drops 0.3 VDC (12-volt
models), 0.6 VDC (24-volt
models), or 1.2 VDC (48-volt models) below the
HBCO value.
• High Batt Temp
– This fault message indicates the inverter/charger
has shut down because the Battery Temperature Sensor (BTS) has reached
a temperature greater than 54°C/129°F.
Remedy:
Once the BTS cools down (
≤
49°C/120°F) it automatically
restarts and continues operation. Ensure the BTS hasn’t been placed
in a hot area or near a hot device. If this is not the issue, then
monitor the BTS display under the
TECH/01 Temperatures
menu—
this reading should be above 54°C/129°F. Now remove the BTS from
the inverter BTS port. If the BTS reading goes to 25°C/77°F, replace
the BTS. If the reading does not go to 25°C/77°F, then inspect the
BTS port for cleanliness and/or have the inverter/charger serviced.
• High Volts AC
– This fault causes the charger to be disabled because
a very high AC voltage (>150 VAC, or >300 volts for export inverters) has
been detected on the AC input.
Remedy:
Remove all AC power from the inverter’s AC input for
at least 15 minutes to automatically reset this fault. Ensure only
120VAC power is connected to each of the inverter’s AC inputs.
