Mobile Fuel Dispenser Truck Fault Analysis
1. Gun Motor Does Not Running
l Failure: Three-phase power supply power shortage; Remedy: Check the power supply line
l Failure reasons: oil gun switch board bad (oil indicator light does not light guns).
l Failure: driver board relay contact burn; Remedy: repair, replacement driver board
l Failure reasons: burning the motor coil; Remedy: motor coil rewinding
l Failure: No board 5V control signal output; Remedy: repair or replace the motherboard mother board
l Failure reasons: a bad power supply board (power light does not shine); Remedy: repair the power board or for board.
2. Gun No Oil Flow Pumping Out from the Nozzle
l Failure: switch board bad (oil gun does not light); Remedy: Replace the switch board
l Failure: board 5V control signal is not joint; Remedy: replace the motherboard repair
l Failure: Driver board relay contact burn; Remedy: Replace driver board or the relay
3. LCD Display Problem
l Failure: liquid crystal film without latching pin; exclusion method: allocate re-insert
l Failure: liquid crystal film damage; exclusion method: for liquid crystal film
l Failure: display board circuit board Weld; Remedy: Try re-soldering
l failure reasons: bad display panel; exclusion method: for display board
4. Control Panel Faulty
l Failure: not a key; Remedy: change or clean the key grain
l Failure: a row, a column not; exclusion method: Line a loose or broken wire
l Failure: all key not work; exclusion method: electronic locks have not closed; for board
l failure reasons: bad display panel; exclusion method: for display board
