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Document #: LIN_EO_SM_IMPAPERION2424_4607818 – 07/21
Troubleshooting
Section 5
UI Alarm Message
Cause
Correction
Motor Drive Status
LED
"Upper Blower OV: 0x06" --OR-- "Lower
Blower OV: 0x06"
Upper or lower drive overvoltage
(line voltage greater than 283VAC)
"Ensure input voltage is within
specifications
"
"Red/Yellow
1 Sec ON/OFF"
Verify the 115VAC jumper is NOT
placed in the drive
Automatic recovery when the line
voltage is less than 265VAC
"Upper Blower Communication Error"
--OR-- "Lower Blower Communication
Error"
Modbus communication error
Make sure all communication
cables are plugged in
"Green/Red
1 Sec ON/OFF"
Unplug and plug the
communication cables back in
Verify cables are not cut or
damaged
Inspect drive's RJ45 jacks. Verify
jacks are not damaged, dirty or
loose
Replace communication cables
Automatic recovery when fault
condition is removed
"Upper Blower Motor Phase loss (0
RPM)" --OR-- "Lower Blower Motor
Phase loss (0 RPM)"
Upper or lower motor phase
disconnected
Check motor is connected to drive "Yellow
Blinking rapidly "
Inspect motor wires and
connectors for damage
Check for opens, shorts or
grounds
Turn OFF the unit using the power
switch, turn the unit back ON after
30 seconds.
Replace motor drive
"Upper Blower Motor Failure (Low
RPM)" --OR-- "Lower Blower Motor
Failure (Low RPM)"
Upper or lower motor not moving
Turn OFF the unit using the power
switch, turn the unit back ON after
30 seconds.
NA
Access the UI Settings Screen.
Enter Service Password. Select the
Calibration screen and then select
the Fan Test screen. Turn motor
OFF and then ON. Verify RPM
values are not "0".
Verify if there are other alarm
messages. Verify the motor drives
status led code, as a Blower Motor
Failure Alarm is usually linked to a
drive failure.
Check for opens, shorts or
grounds
Replace motor drive
