Doosan B20S-3, Specifications Systems Operation Testing & Adjusting, Page: 51 / 123

50 MicroController Control System Testing And Adjusting
15) EEPROM PAR.KO
Fault in the area of memory in which the
adjustment parameters are stored. This alarm
inhibits machine operation. If the defect persists
when the key is switched off and on again,
replace the logic. If the alarm disappears,
remember that the parameters stored previously
have been cancelled and replaced by the default
values.
16) EEPROM CONF.KO
Fault in the area of memory in which the special
chopper configuration data is stored. If the defect
persists when the key is switched off and on
again, replace the logic. Otherwise, keep in mind
that the chopper configuration has been reset to
the default values(regeneration version, etc.); thus
it must be reprogrammed.
Consult the console manual.
17) EEPROM DATA KO
The data in the area of memory for the hour-metre
is incorrect. This alarm does not shut down the
machine. If the alarm disappears when the key is
switched off and on again, keep in mind that
hour-meter data has been reset to zero.
18) EEPROM OFF LINE
Fault in the nonvolatile memory that contains data
relative to the area for the hour-metre, the alarm
stored and the programming parameters.
If the alarm persists when to key is switched off
and on again, replace the logic.
19) CHOP NO CONF.
An alarm similar to no 16, except that here, even
though the data is correct, it does nit correspond
to a hardware configuration recongnised by the
H2B. The considerations are the same as for alarm
16 “EEPROM CONF.KO”.
20) WATCHDOG
The test is made in both running and standby.
It is a self-diagnosis test within the logic. If an
alarm should occur, replace the logic.
21) SHORTED COIL
An overload or a shot circuit BATT on
the contactor negative driver outputs.
Possible causes:
a) The contactor coils are short circuited or
absorb more than 6A continuous.
b) Short circuit with +BATT of the wiring that
comes from the contactor connector.
The alarm indicates the occurrence of an
overload, not the breakdown of a chopper
component. Once the external cause is
removed, the chopper can be restarted.
22) DRIVER SHORTED
The test is carried out in standby, and checks that
the voltage of the drivers that control the contactors
is consistent with the preset value.
Possible cause:
a) Logic failure.
b) Driver breakdown caused by overvoltage in the
contactor negative wiring. Replace the logic
after having removed the cause.
Pump controller
1) STAND BY VMN LOW
The test is carried out in standby. If the VMN
voltage is lower than 1/3 of the battery voltage, an
alarm is signalled. Possible causes:
a)Check the motor wiring to make sure it is correct.
b)Chopper broken, replace.
2) NO FULL COND.
The test is carried out in full conduction.
If, in this condition, the VMN is found to be greater
than 1/3 VBATT, the diagnostic circuit is faulty,
causing a safety risk, and thus machine operation
is inhibited. If the defect persists, replace the logic.
3) TH.PROTECTION
An indication that the chopper temperature has
exceeded 80°C. The maximum current is gradually
reduced, reaching 0 at a temperature of 85°C.
If the alarm occurs while cold:
a) Check the thermal sensor connection.
b) Thermal sensor failure.
c) Connection on the power interrupted(check the
connector that connects the logic to the power
unit).
d) Logic failure.
4) BATTERY
The battery charge is low.
The alarm is signalled only if the BATTERY CHECK
option has been selected.
All functions except hydrdrive are inhibited.