Broan ERV140 ECM, Installation Manual

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20
8. TROUBLESHOOTING (
CONT
’
D
)
P
ROBLEMS
P
OSSIBLE CAUSES
Y
OU SOULD TRY THIS
5
Unit does not work (LED
not lit on power up).
• Unit is unplugged.
• No power to power outlet.
• The fuse may be defective.
• J10, J9, or J8 connector(s) may be
unplugged.
• The transformer may be defective
(no 9.5 VAC between J8-4 and J8-5).
• The PCB may be defective.
• Make sure the unit is plugged.
• Test the power outlet with another electrical device (e.g.: a
lamp). If it does not work, call an electrician.
• Check if fuse F1 (located on the PCB) is blown. In that case,
replace fuse F1 as per product nameplate.
• Check the connection of J10, J9, and J8 connectors.
• With unit powered on and J9 connected, check if there is
about 9.5 VAC between transformer connector J8-4 and
J8-5 (YELLOW wires). If not, change the transformer.
6
Auxiliary control does not
work.
• The wires may be in reverse postion.
• The wires may be misconnected.
• The wires may be broken.
• The push button may be defective.
• Ensure that the color coded wires have been connected to
their appropriate places.
• Ensure the wires are correctly connected.
• Inspect every wire and replace any damaged ones. If wires
are hidden into walls, test the control using a shorter wire.
7
The damper system
does not work
(
AMBER error code ).
At power up, no RED LED .
At power up, LED lights up in RED
and there is a clicking sound coming
from electrical compartment, but
damper does not move
:
• Ice or other things hindering the
damper
movement.
• J12 unconnected or bad contact.
• Wrong connection of J8.
• The transformer may be defective
(no 24 VAC between J8-1 and J8-2).
• The damper actuator may be
defective.
• See point 5.
• Remove ice or hindering elements.
• Check J12 connection (both harness side and board side).
• Check J8 connection.
• With unit powered and J9 connected, check if there is about
20-24 VAC between transformer connector J8-1 and J8-2
(ORANGE wires). If no, change the transformer.
• Replace the damper system.
Damper moves but does not stop
when supposed to
:
• Bad connection of J12 connector.
• Damper defective.
• The main PCB is defective. • Check J12 connection (both harness side and board side).
• Replace the damper system.
• Replace the main PCB.
• Unplug the unit. Disconnect
the main control and the
auxiliary control(s) (if need
be). Jump
G and B terminals.
Plug the unit back and wait
about 10 seconds. If the motors run on high speed and the
damper opens, the circuit board is not defective.
NO C NC I OC OL Y R G B
VE0097
• Jump the OL and OC
terminals. If the unit switches
to high speed, remove the
push button and test it right
beside the unit using another
shorter wire. If it works here, change the wire. If it doesn’t,
change the push button.
NO C NC I OC OL Y R G B
VE0098