Troubleshooting
There are 26 ways to improperly connect two packs to a charger! After the START/STOP button is
pressed, a special battery checking sequence automatically checks every wire before initiating a charge.
It is possible to get an unrelated safety code from a simple wiring issue.
Operating errors appear as messages in the display. To determine the problem, look up the description
below. Correct the error. If errors continue, contact FMA Customer Service.
Code/Message Problem
Neg. Term. < 0V Check pack wiring
Supply < 10 Volts Input supply voltage is too low
Supply > 32 Volts Input supply voltage is too high
Supply Unstable Check for a loose supply connection or thin wiring
Ch2 No Add Up Check pack wiring or dirty connectors
Chg. Overvoltage Cell is too high
C2 Pack Detected A pack was detected on channel 2 after starting charge
Series Chargers Check Pack wiring. Check for 2 chargers on a series pack.
Low Voltage Cell A cell is too low
Cell < 0.1V The cell voltage is too low on a cell
Reverse Polarity Check pack wiring
Node 10 < 0V Check pack wiring
Ch2 Bad S. Count Channel 2 couldn’t identify the pack. Check for correct node setting.
System Softstart Check the power supply is big enough. Loose input connections.
2 Pack Con. Err. Check pack wiring
Ch1 No Add Up Check pack wiring or dirty connectors
Unbalanced Only Unbalanced charge detected voltage on the node connector.
Ch1 has no pack Check pack wiring or dirty connectors
Positive < 0V Check bananas
Butt Not Pressed The confirm chemistry mode button was not pressed
Pack Detect CH1 Unbalanced charge detected voltage on the node connector
Pack Detect CH2 Unbalanced charge detected voltage on the node connector
Charge Timeout The pack is taking too long to charge
Bad Amps Setting Charger safety check
Amps Not Raising Check the banana wiring
Bad Fuel Table # Corrupted preset. Factory restore the charger
Bad Lith Fuel Tb Corrupted preset. Factory restore the charger
A123 < 2.7V/CELL Cell low voltage
A123 > 3.8V/CELL Cell high voltage
Options Corrupt Factory restore the charger
L.Supply V.Limit The supply voltage reached the cutoff
No Auto Amps Auto amps are not allowed in some chemistries
Chem Not Found Corrupted preset. Factory restore the charger
LIPO < 3.0V/CELL Cell low voltage
LIPO > 4.2V/CELL Cell high voltage
Set Amps >= 2A Lower the amps setting
Bad Banana Tot V Check the connectors. Clean the connectors.
Preset is Blank Change presets or factory restore
No Fuel Table Corrupted preset. Factory restore the charger
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