20
Code Condition
Potential
Causes
Proposed Action
Lr
Locked rotor
fault with
PMA running
(con’t)
(see note
below)
Foreign material in
PMA or defective
PMA
(con’t)
5. Pull extractable part of the pump.
Note: Pump Motor Assembly shell can be damaged by blows from
hard surfaces; use care in removing it.
6. Remove black end cap from PMA and attempt to spin rotor with a
3/16” Allen wrench to determine if there is any binding. If binding or
physical damage, continue with next step. If no binding or physical
damage to the PMA, and it is a new installation, reinstall extractable.
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 (VS4 or VS2) 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, a partial short can result from a nick in one of the pump power wires coupled with
water in the electrical conduit from the EcoVFC to the pump. This condition is not a direct short, so the
EcoVFC does not ash short circuit (SC). Instead, the EcoVFC will see this condition as abnormally high
power consumption, and ash locked rotor (LR).
EcoVFC Replacement Parts
Description Part Number
Fan Assembly 223919930
User Interface Board 225040930
Normally Open Relay 228289930
Window Lens 402623930
Nylon Screw 223561102
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