Yamaha EF4500iSE Theory & Diagnostics Manual page 20

Yamaha Generator Theory & Diagnostics Guide
3/14/03 4:20 PM
Overload Indicator Lamp:
The DC-DC converter is turned on automatically,
when the generator output exceeds over 180% of its
rated load to boost generator output to assist the
starting current of the load, such as an air condi-
tioner.
When the DC-DC converter is turned on automati-
cally, the generator is obviously overloaded, thus the
overload indicator lamp blinks quickly with 0.5-sec-
ond interval for 10 seconds. And the lamp blinks
slowly with 1-second interval for 3 minutes and 50
seconds. During this period, the DC-DC converter is
prevented from rebooting to prevent the battery from
over-discharged.
Designation of LED Indicators:
DC-DC converter unit is equipped with two indicator lamps (LED) on the unit. When the DC-DC converter is
activated automatically, indicator lamps are lit or blink to designate the state of the system. The designations
of indicator lamps are listed in the table below.
Green LED
ON
Blink
OFF
OFF
NOTE: The red LED turns ON and interrupts DC-DC converter output automatically to protect the component,
when any of the abnormal operating conditions is detected, and returns to normal operation automatically as
soon as the abnormality is recovered.
Abnormal conditions are:
1. Too high temperature in the component
2. Too low battery voltage, below 9.5V
3. Too high battery voltage, over 18V
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Green LED
ON
Blink
OFF
OFF
Red LED Designation
OFF Standby mode
OFF Output (for 10 seconds maximum)
Blink For 10 seconds after shutdown
ON Alarm mode
1-16
Red LED Designation
OFF Standby mode
OFF Output (for 10 seconds maximum)
Blink For 10 seconds after shutdown
ON Alarm mode