18
EEC3 System Manual
Step 2 - Record Alarm Codes
Step 3 - Determine Cause of Alarm / Repair
John next noticed that the keypad LEDs began to
alternate every 4 seconds between slow blinking
and fast blinking. He recorded the LEDs that were
blinking slow and the LEDs that were blinking fast
on the chart (see pg. 4). The sequence of blinking
keypad lights showed the system went into alarm a
total of 3 times.
Slow blinking
Fast blinking
John pressed the SYNC button to reveal the first
alarm code. He recorded the sequence of blinking
LEDs (pg. 5) and using the alarm code description
chart (pg. 6), John determined that the battery
voltage at startup was below 9.6 volts. By press-
ing the SYNC button a second time John was able
to retrieve the next alarm code, and repeated this
process for the last alarm code.
Slow blinking
Fast blinking
Now that John discovered that the reason for the EEC system
alarm code was low battery input voltage, he was able to focus
on discovering the reason for this low battery voltage. After fur-
ther investigation, he found two problems with his battery sup-
ply to the control system. The first problem is that only one bat-
tery power sources was connected to the EEC system, rather
than two battery sources (see paragraph ___ for more informa-
tion).
Secondly, the battery source that was connected (generator
battery) was very low in voltage due to a failed battery charger.
John fixed the problem with the generator battery charger,
which charged the generator battery, and the EEC system
immediately began to operate. Later, John had his marine
electrician install a wire and circuit breaker to his house
(domestic) battery source to provide a second battery source
for the EEC system.
