GU641A Controller Operation Manual
19
6. Pre-alarm and Shutdown Alarm
6.1 Pre-alarm (warning)
(NOTE: Pre-alarms are non-critical failure conditions and do not affect the operation of the
generator system, they serve for drawing the operators
’
attention to an undesirable condition so
they can remove it to ensure continuous running of the system. When Pre-alarms occur, the
Pre-alarm LED illuminates, but failure will not be locked out and the unit will not shutdown.
Once the Pre-alarm failure is removed the Pre-alarm LED will automatically turn off.)
Pre-alarm / Description
LCD displays
CHARGE FAILURE
: After safety-on times up, if the charging voltage from the
excitation contact of alternator is lower than the
“
ALT. low preALM
”
, the pre-
alarm LED illuminates and the buzzer sounds, LCD displays:
BATT. UNDER VOLT
: If controller detects that battery voltage has fallen below
the
“
Batt. Undervolt
”
, pre-alarm LED illuminates and the buzzer sounds, LCD
displays:
For example,
“
Batt. Undervolt
”
preset as: 23.6V, when battery voltage falls
below this value, LCD flashing low value icon.
BATT. OVER VOLT
: If controller detects that battery voltage has exceeded the
“
Batt. overvolt
”
, the pre-alarm LED illuminates and the buzzer sounds, LCD
displays:
For example,
“
Batt. overvolt
”
preset as: 28.2V, when battery voltage exceeds
this value, LCD flashing high value icon.
LOW OIL PRESS
: If controller detects that the engine oil pressure has fallen
below the
“
Oil-P low preALM
”
after the safety-on timer expired, the pre-alarm LED
illuminates and the buzzer sounds, LCD displays:
For example,
“
Oil-P low preALM
”
preset as: 2.2BAR, when engine oil pressure
falls below this value, LCD flashing low value icon.
HIGH TEMP
: If controller detects that engine coolant temperature has exceeded the
“
Coolant preALM
”
, the pre-alarm LED illuminates and the buzzer sounds, LCD
displays:
For example,
“
Coolant preALM
”
preset as: 95
℃
, when engine coolant temperature
exceeds this value, LCD flashing high value icon.
OVER SPEED
: If engine speed exceeds the
“
Over SP preALM
”
, the pre-alarm
LED illuminates and the buzzer sounds, LCD displays:
For example,
“
Over SP preALM
”
preset as: 1600RPM, when engine speed
exceeds this value, LCD flashing high value icon.
UNDER SPEED
: If engine speed falls below the
“
Under SP preALM
”
after the
safety-on timer has expired, the pre-alarm LED illuminates and the buzzer sounds,
LCD displays:
For example,
“
Under SP preALM
”
preset as: 1440RPM, when engine speed
falls below this value, LCD flashing low value icon.
OVER CURRENT
: configure
“
Overcurrent action
”
as
“
warning
”
, if controller detects that
any phase output current exceeds the
“
Overcurrent level
”
after the safety-on timer has
expired, the pre-alarm LED illuminates and the buzzer sounds, LCD flashing high
value icon.