Crown 40FCTT-188; S/N: 9A121797; 36Volt; Battery condition is good and voltage is 38.08 or 2.11 volts per cell.
Turn key switch to green, display reads "key" as normal. Turn to yellow, all lamps illuminate and display reads "test" as normal. Release switch, return to green and the yellow battery symbol lamp at the base of the green battery state of charge lamps flashes steady on off. Nothing on the display readout, no drive operation, no lift operation. When seat switch is closed I can hear relay click. When park brake is released and seat switch is open the alarm sounds as it should but display does not read "brak". Same when direction lever selected forward or reverse and park brake applied, display does not read "DIR". Once the battery symbol begins to flash the display reads nothing.
This is an intermittent issue and truck will resume normal operation sometimes if I open, then close the battery disconnect and restart the lift. It does not always work though.
Does anyone have a digital copy of the service manual for this lift truck? If not I plan to order one but it is a few weeks out says dealer.