06-23-2015 01:45 PM
I have run into this before. The controller needs to see an engine speed signal, as well as a certain voltage to the AR relay. Look at this:
On the 2001 control panels, measure AC voltage at pins 16 and 20 (wires 108
and 115) of the pcb board while the genset is running. The connections are the
coil voltage connections for the AR relay and must see at least 180 volts AC or
the unit will shut down on Fail To Start.
On the 4001 and 4001E control panels the connections are pins 9 and 21 (wires
108 and 115) on the main pcb board.
Likely causes of low or no voltage
Blown voltage detection fuse – F2, F3, or F4.
Loose, broken or burnt voltage detection wiring – 102, 103, or 104.
Voltage detection link in the incorrect position on terminal strip – for 300
volt and lower applications it should link wire 115 with wire 110. For higher
voltage applications it should link wire 115 to wire 101.
AR relay on pcb board has failed.
Motor starting load causes alternator output voltage to drop below 180
06-23-2015 01:32 PM
I appreciate anyone's attention to this problem.
The genset starts and runs normally for approximately 15 seconds until the fail to start lamp lights up.
The starter drops out as in normal operation and does not reengage the ring gear.
What does the controller sense in order to tell whether or not the engine is running?
Solved! Go to Solution.