IMPAQ™
Owner’s Manual
AM-IMPAQ-OM
Rev AB October 2018
20
FAULT CODES
In case of a fault, one of the corresponding fault codes listed below will appear on the display.
If it is a critical fault, charging will stop and the red Fault LED will be illuminated.
Fault Display
Fault
Critical
Cause
Solution
DF1
Yes
Low output current
Check input voltage and fuses. Call
for service.
DF2
Yes
Output fault
Check for proper battery connection
(reversed polarity). Check output fuse.
Call for service.
DF3
Yes
Improper battery
Battery voltage too high (>2.4 Vpc) or
too low (<1.6 Vpc). Use proper
charger for battery.
DF4
No
The battery has been
discharged more than 80%
of its capacity
Prevent future over discharging of
battery. Battery charge gauges and lift
interrupts may need calibration.
DF5
No
Battery requires inspection
Non critical fault. Check battery cables
for condition and size, check for loose
connections, check for defective cells.
DF7
No
Inspect battery
Non critical fault. This will cause the
charge to terminate early. Battery may
require service.
Check the battery (temperature,
specific gravity…).
Check the battery condition of use.
Check the configuration in the menu
(charge cables parameters).
TH
Yes
Charger overheating
Check that fans are working. Verify
that ambient temperature is not too
high. Inspect to see if charger
ventilation is obstructed or impaired.
MOD TH
No
Alternating with charge
parameters
– one or more
module in thermal fault
– the
charge process continues
–
the fault module(s) is(are)
dis red led flashing.
Check that the fan(s) is(are) working
correctly and/or that the ambient
temperature is not too high or or
whether there is poor natural
ventilation to the charger. If all
modules are in thermal fault a TH fault
will follow.