rev. 1904 (EX - FW 6.4)
10 /20
5.B TROUBLE SHOOTING - Single Phase - 5DTM
Here is a list of typical "FAULT" indications from LEDs signals or coming from the "Navigator".
This information relates to a 5DTM charger with a DC current reader, but without an auxiliary transformer (P4=2)
Legend:
-- = LED is off
On = LED is ON steady L = LED is flashing
Situations BEFORE the charge (1-9) and DURING the charge (10-20)
ref L1 L2 L3 L4 L5
Display
BEFORE the charge
DC is missing
: board is fully off
Battery is not connected to the charge or voltage is very low (<7-8V).
Vac mains might be present. Possible reasons:
The fuse protecting the diode bridge is burnt.
The battery plug or battery cable is damaged, cut or disconnected.
Electronic board not powered or faulty.
Battery/Cell Terminal bolt is loose or missing.
DC under voltage
: Battery is connected to the charger but voltage is
below min threshold (1.7V/Cell or 85% nominal Voltage).
Charge can not be performed
1 -- -- -- -- --
2 On -- -- -- L
3 On -- -- -- On
Overvoltage in battery
; Battery voltage is over maximum permitted
threshold (>2.9V/Cell); Wrong battery connected or heavily sulphated.
DURING the charge
10 On -- -- -- L
AC Mains is missing
: 5DTM can not understand in advance is Mains is
missing, so charger has attempted to start charging but detected that Vac
Mains is missing. Please check AC input plug connection. the main switch of
the power line and related input AC fuses/breaker. When AC power is back
the system restarts automatically
11 On -- -- On --
WARNING
: Charger is supplying current but nominal voltage has not yet
reached (between 85-100% Vnom).
Battery Ah capacity is probably too big for the charger’s current rating.
After some minutes the charger might stop automatically for over-current
alarm (ter or terc). The charger will attempt to complete the charge by
taking multiple pauses
12 On -- -- -- L
Under current
: The current to the battery is below the minimum threshold
(2-3 A). Charger will try to restart every few minutes on.
Possible Reasons: A) There might be a possible bad contact or a connection
problem B) Check AC mains plug connection, the main switch of the
electric line and the input AC fuses/breaker. C) Battery sulphated. D) The
Mains and the transformer plug are not well-matched E) The current
(Ammeter) sensor or its connection cables are damaged.
13 On -- -- --
L
Thermal fault
: Error "
ter
" occurs when one or more thermal probes into
the power transformer are open. It must be very hot.
When the temperature drops probes are restored and the system restarts.
The "
terc
" error is a preventive block of the charger to reduce the
temperature of the power transformer because too high current levels have
been detected. After a time it starts autmatically
Possible Reasons: A) Battery is too big (Ah) for the charger B) The Mains
are too high or the transformer plug are not well matched C) Battery is too
discharged D) Ambient temperature is too high or there is not enough fresh
air around the charger E) thermal probe are defective F) board has a wrong
setting
14 On -- -- -- On
TiME Errors
: many timers are set to protect the charger and the battery
Time:
Maximum charging time Phase 1 has been exceeded: 11h (ph1)
t_t2
: Maximum charging time Phase 2 has been exceeded: 9h (ph2)
tout
: Maximum overall charging time has been exceeded: 18h (total)
Any of these alarms can be caused in following cases:
1) AC Mains is too low
2) Vac tapping on power transformer is not in the correct position
3) Battery is not suitable: Ah too big or battery is damaged. Battery does
not reach 2.4V/Cell at end of Phase 1.
4) Wrong card setting
5) Diode bridge failure
STAND-BY MODE
: The 5DTM chargers do not have AC auxiliary power but only battery power. To preserve energy, the
display switches to standby mode after a minute. For 1 sec shows the last data and for 4 sec it turns off (
)
Pressing any key it turns on for a minute.
NOTE 1:
during start-up phase all LEDs light up and display shows
for some seconds to test the elements
NOTE
2:
Some errors can resolve themselves if the situation returns to normal (bat1, ter, terC and E_AC), the "cur" error retries
a start every minute. The others (bat5, bat9, time, tout) block the charger until the intervention of an operator who must
disconnect the battery and analyze the reasons
