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Troubleshooting
Problem
Level sensor is not sensing
material when material is
present.
Level sensor is sensing
material when material is
not present.
3A2806A
Cause
Level sensors out of calibration.
Intermittent electrical connections.
FCM errors.
Level sensors out of calibration.
Level sensors blocked inside reser-
voir.
Intermittent electrical connections.
FCM errors.
Solution
Calibrate level sensor.
Replace level sensor.
Ensure the system main power is ON.
Ensure all electrical connections to the level
sensor are secure. See electrical schematic
in either the HFR or VRM Repair-Parts man-
ual.
Check FCM. A red LED indicates a problem
with the module. See electrical schematic in
either the HFR or VRM Repair-Parts man-
ual.
Replace FCM.
Calibrate level sensor.
Replace level sensor.
Check inside reservoir to ensure there is
nothing blocking the level sensor.
Ensure the system main power is ON.
Ensure all electrical connections to the level
sensor are secure. See electrical schematic
in either the HFR Repair-Parts manual.
Check FCM circuit breaker in base cube to
see if it has tripped. See electrical sche-
matic in either the HFR or VRM
Repair-Parts manual.
Check FCM. A red LED indicates a problem
with the module. See electrical schematic in
either the HFR or VRM Repair-Parts man-
ual.
Replace FCM.
Troubleshooting
19
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