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Troubleshooting Guide for VaporTEK Pump
Troubleshooting and Analysis
MDE-5394B VaporTEK™/VaporTEK-3 Controller Board 110 V UL® Vapor Recovery Collection System for Encore® 500 S
Start-Up and Service Manual · March 2019
Troubleshooting Guide for VaporTEK Pump
The following table lists the troubleshooting guidelines for VaporTEK pump:
Problem
Cause
Corrective Procedure
Pump Fails to
Start
No power to VaporTEK-3 controller
Verify power circuit breaker is switched ON/verify input voltage rating and
wiring is correct.
F1 fuse (T4A) blown out on the VaporTEK-3
Controller
Replace F1 fuse rated for 250 V/T4A.
VaporTEK pump motor/sensor lead wires to
VaporTEK-3 Controller wired incorrectly
Incorrect wiring will damage both VaporTEK pump and the controller.
Check the motor/sensor cable connections. Verify the cables are
connected as per the appropriate schematic in the
. Replace both VaporTEK pump and
controller, if wired incorrectly.
Incorrect jumper setting
Verify that the jumper J3 “PROGRAM” is not set (set = Flash mode).
No input fuel pulses
Check pulse input wiring on VaporTEK-3 Controller. Also, verify input
LEDs (LED V3 isn't flashing fast which means no fuel flow).
No communication between VaporTEK-3
dispenser main controller
Verify the 26-pin ribbon flat cable or replace it. Check pulse LED V9-V12
if these are flashing during a very slow transaction.
Flow rate below 6 LPM
Increase fuel flow rate beyond 6 LPM.
Blocked Vapor Pumping Unit
Remove the motor from the pumping unit and let it run. If the pumping
unit is clogged try to release the clog or replace the pumping unit.
Temperature in the dispenser electronic cabinet
is lower than the rating.
Install appropriate heater as defined by the dispenser manufacturer.
Temperature in the hydraulics area of the
dispenser is lower than the VaporTEK pump
rating
Starting torque friction beyond motor capability. Install the appropriate
heater as defined by the dispenser manufacturer.
Pump thermal protector trips - ambient
temperature above rated temperature of the
product
Verify proper ventilation for the VaporTEK pump. Wait for a couple of
minutes before starting the pump again.
Defective VaporTEK-3 Controller
Replace VaporTEK-3 Controller.
Low Flow Rate
Blocked inlet or outlet line
Clean inlet or outlet line if clogged and follow the purging procedure.
Incorrect fuel pulse rate
Verify and enter correct fuel pulse rate.
System out of calibration
Autocalibrate the system.
Vapor valve not fully opened or restriction in the
hanging hardware components (nozzle,
proportional valves, hose, or any other product)
Open vapor valve fully. Remove restriction or replace component.
High Flow Rate
Incorrect fuel pulse rate
Verify and enter correct fuel pulse rate.
System out of calibration
Autocalibrate the system.
High Noise And
Vibration
VaporTEK pump mounting onto dispenser is
loose
Tighten. Ensure that the vibration mounts and hardware is secure.
Secure the pump more rigidly. Use vibration dampeners, if necessary.
Without success, replace pumping unit.
