Roubleshooting - Broan ERV140 ECM Guia De Instalacion

9. TROUBLESHOOTING (
Table 8 B only applies for ERV140 ECM and HRV160 ECM units.
When these units have a RED flashing LED, follow these few steps before proceeding to troubleshooting:
• Unplug the unit.
• Unplug the green control terminal connector.
• Remove the unit door in order to see the motors, making sure that there is no risk of injury.
• Plug unit back and wait until the booting sequence is completed.
• Press the integrated control push-button, and observe the LED and motors.
• Proceed to troubleshooting.
P
ROBLEMS
The LED flashes RED as
soon as the unit is set to
low speed.
The exhaust motor does
not run at all (not even
a pulse when hitting the
button) and LED flashes
RED after 20 seconds.
The exhaust motor is
running at a wrong speed
and LED flashes RED after
20 seconds.
8 B
The supply motor does
not run at all (not even
a pulse when hitting the
button) and LED flashes
RED after 20 seconds.
The supply motor
running at a wrong speed
and LED flashes RED after
20 seconds.
If the problem is still not solved, reach our Technical Support:
' )
CONT D
P
OSSIBLE CAUSES
• The J11 connector
misconnected or there may be a bad
contact.
• The J5 connector
misconnected.
• The JU1 jumper
mispositioned.
• The PCB may be defective.
• The motor may be defective.
• The J17 connector
misconnected.
• The JU1 jumper
mispositioned.
• The PCB may be defective.
• The motor may be defective.
• The J4 connector
misconnected or there may be a bad
contact.
• The JU1 jumper
mispositioned.
• The PCB may be defective.
• The motor may be defective.
is • The J15 connector
misconnected.
• The JU1 jumper
mispositioned.
• The PCB may be defective.
• The motor may be defective.
Broan-NuTone LLC
Telephone: 1-800-543-3055
Y
OU SOULD TRY THIS
may be • Check J11 wires connection.
may be • Check J5 wires connection.
may be • Check that JU1 jumper is positioned in H (pins 1-2).
• Invert J4 and J5 connectors. If the issue is now with the
supply motor, replace PCB. If the issue remains with the
exhaust motor, replace motor.
• Replace exhaust motor.
may be • Check J17 wires connection.
may be • Check that JU1 jumper is positioned in H (pins 1-2).
• Invert J17 and J15 connectors. If the issue is now with the
supply motor, replace PCB. If the issue remains with the
exhaust motor, replace motor.
• Replace exhaust motor.
may be • Check J4 wires connection.
may be • Check that JU1 jumper is positioned in H (pins 1-2).
• Invert J4 and J5 connectors. If the issue is now with the
exhaust motor, replace PCB. If the issue remains with the
supply motor, replace motor.
• Replace supply motor.
may be • Check J15 wires connection.
may be • Check that JU1 jumper is positioned in H (pins 1-2).
• Invert J17 and J15 connectors. If the issue is now with the
exhaust motor, replace PCB. If the issue remains with the
supply motor, replace motor.
• Replace supply motor.
Technical Support
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