17
Code Condition Potential Causes Proposed Action
LU (cont.) Locked
Rotor fault
at PMA
startup
(con’t)
(see note
below)
Foreign material in PMA
or defective PMA.
7. Turn on the power to the EcoVFC unit and verify correct
system operation. If condition is corrected, do not
continue to the next step. If condition is still present,
remove the extractable (repeat Steps 3, 4, and 5) and
continue to the next step.
Note: PMA can have a locked rotor during startups if it has
been exposed to a corrosive environment, such as a tank
ballasted in water.
8. Remove four 5/16” cap screws that connect the PMA with
¼” Allen wrench and remove the PMA from the motor
discharge head.
Note: Prior to mounting a new PMA, check lead assembly (wires
inside the extractable portion to PMA) for shorted wires
which may have caused the condition.
9. Replace with a new variable speed (PMAMVS4 or
PMAVS2) pump motor.
Note: Pump motor shell can be damaged by blows from hard
surfaces; use care in replacing.
10. Re-install extractable and secure by following reverse
order of disassembly.
11. Turn on power to the EcoVFC unit and verify correct
system operation.
Note: In rare installations where motor wiring runs are extremely long and / or of a small wire diameter, a false LU (locked
up) may be displayed on the EcoVFC. See the table of recommended maximum wire length to wire gauge for
submersible wiring in the beginning of this manual.
Code Condition Potential Causes Proposed Action
Er
Extended
Run
Continuous hook signal
applied for greater than
60 minutes without
change in pumping
product ow rate
1. Disconnect power at load center. Lock and tag out circuit
breaker.
2. Check voltage across hook terminals with all dispenser
handles off. There should be no voltage applied. If
voltage is present, contact an electrician to correct the
problem. After the problem has been corrected, turn on
input power and verify system is operating correctly.
SU
Upper rail
short
Short Circuit condition in
eld wiring or component
failure internal to the
EcoVFC
1. Press reset button on EcoVFC
2. Check for proper operation.
3. If fault re-occurs turn off power to EcoVFC, lock out and
tag circuit breaker. Disconnect the wires to the STP at
the controller terminals marked Black, Orange and Red.
4. Use wire nuts and cap each wire off to prevent any
possible shorts in the controller. Turn power on to
the EcoVFC and observe the display. If the controller
indicates an OC (open circuit) condition follow the
troubleshooting steps for a short circuit
5. If controller display indicates the SU (upper rail short)
condition then replace the EcoVFC.
rI
Capacitor
bank
Bad EcoVFC
capacitor bank
1. Push reset button on the EcoVFC.
2. If fault condition still exists, replace EcoVFC unit.
3. If fault is cleared observe the EcoVFC in normal
operation for approximately 10 minutes to see if it
functions normally. If error resurfaces, replace EcoVFC.
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