Doosan B20S-3 - Diagnostics & Alarm Analysis

46
MicroController Control System Testing And Adjusting
Alarm Displayed on The Console & Instrument Panel
DISPLAY STATUS CONSOLE ALARM MESSAGE
OK System normal operation -
No Display
After all display
(two times)
- Fuse blow-out
- Regen. contactor is not operated
BRAKE CONT OPEN
PP
Wait(chat) mode
(after hyd. Time without any operation in neutral)
-
E1 Drive motor brush is worn. -
EC(With Symbol)
Drive controller thermal protection when the
temperature rises above 85°
THERMAL PROTECTION
Ec(With Symbol)
Pump controller thermal protection when the
temperature rises above 85°
TH. PROTECTION
Ed(With Symbol) Drive motor thermal protection
EP(With Symbol) Pump motor thermal protection
EL Battery Lock-out(Below 45V) BATTERY LOW
EE
The key switch is turned to on or seat switch
are closed after seat switch delay time when
the position of direction lever is not neutral or
accelerator is pressed.
INCORRECT START
EE(Flashing)
- The key switch is turned to on and no one is
in the seat.
- The seat switch is opened longer than seat
delay time.
-
A Head capacitor problem CAPACITOR CHARGE
F Internal circuit of logic problem
- EEPROM PAR KO
- EEPROM CONF KO
- EEPROM DATA KO
- EEPROM OFF LINE
- CHOP NO CONF
- WATCHDOG
F0
- Drive over current during 5 sec. In chopper mode.
- Drive over current during 1.5 sec. In bypass mode.
HIGH CURRENT
F1 Accelerator problem VACC NOT OK
F2 Drive mosfet failure(shorted)
- VMN LOW
- I HIGH AT STAND
F3 Pump mosfet failure(shorted)
- STAND BY VMN LOW(HP)
- I HIGH AT STAND(HP)
F4 Drive & pump mosfet failure(shorted) -
F5 Drive mosfet failure(opened)
- VMN HIGH
- I = 0 EVER
- NO FULL COND.
F6 Pump mosfet failure(opened)
- I = 0 EVER(HP)
- NO FULL COND.(HP)
F7 Drive & pump mosfet failure(opened) -
FA Regen. contactor closed - BRAKE CON CLOSED
Fb
Battery Mismatch
(Batt Volt
≤ 40V Or Batt Volt ≥ 60V)
-
Fc Contactor problem
- DIR CONT OPEN
- DIR CON CLOSED
FL Lift sensor problem VACC NOT OK(HP)
FF Serial communication failure -