Document #: LIN_EO_SM_IMPAPERION2424_4607818 – 07/21
27
Section 5
Troubleshooting
UI Alarm Messages
UI Alarm Message
Cause
Correction
Motor Drive Status
LED
"TC#1 and TC#2 Error" --OR-- "TC#1
Error" --OR-- "TC#2 Error" -- OR -- "Err"
in the set point temperature field
(manual or recipe mode)
One or two thermocouples
disconnected
Verify both thermocouples are
connected to the IO Board
NA
Inspect the thermocouple wires
and connectors to verify wires are
not cut or disconnected
Automatic recovery when fault
condition is removed
"Upper Blower SC: 0x01" --OR-- "Lower
Blower SC: 0x01"
Upper or lower motor phase to phase
short circuit
Turn OFF the unit using the power
switch, turn the unit back ON after
30 seconds.
"Red
1 Sec ON/OFF"
Disconnect unit from main power
input (unplug unit). Check for
motor phase to phase shorts.
Inspect wires.
Replace motor drive
"Upper Blower OC: 0x02 (Warning)"
--OR-- "Lower Blower OC: 0x02
(Warning)"
"Upper or lower motor current
overload (120% of full load)
*The motor speed is reduced
to maintain the current limit
"
"Check the door is closed. Inspect
door latches
"
"Red
ON continuously"
Make sure fingers are installed
correctly
Turn OFF the unit using the power
switch, turn the unit back ON after
30 seconds.
"If motor is making excessive
noise or vibrating excessively,
replace motor assembly.
"
Replace motor drive
"Upper Blower OC: 0x03" --OR-- "Lower
Blower OC: 0x03"
Upper or lower motor current
overload (drive/motor in overload for
greater than 6 seconds)
Check the door is closed. Inspect
door latches
"Red
0.25 Sec ON/OFF"
Make sure fingers are installed
correctly
Turn OFF the unit using the power
switch, turn the unit back ON after
30 seconds.
"If motor is making excessive
noise or vibrating excessively,
replace motor assembly.
"
WITH OVEN UNPLUGGED: Turn fan
blade to check for locked rotor.
Replace motor drive
"Upper Blower UV: 0x04" --OR-- "Lower
Blower UV: 0x04"
Upper or lower drive undervoltage
(line voltage less than 151VAC)
"Ensure input voltage is within
specifications
"
"Red/Yellow
0.25 Sec ON/OFF"
Automatic recovery when the line
voltage is greater than 174VAC
