11. Troubleshooting - Broan HRV90HT Guia De Instalacion

11. TROUBLESHOOTING

If the unit does not work properly, reset the unit by unplugging it for one minute and then replug it. If it still not working properly,
refer to table below.
If the integrated control LED of the unit is flashing, this means the unit sensors detected a problem. See the table below to know where
the problem occurs on the unit.
LED E
SIGNAL
LED flashes GREEN Thermistor error
LED flashes AMBER Damper error
LED flashes RED • The door is open and
• Exhaust motor error
P
ROBLEMS
Unit does not work.
1
The damper actuator
does not work.
2
The wall control does not
work.
3
The Humidity Control
does not work OR the
20-minute push button
timer does not work OR
4 its indicator light does not
stay on.
RROR TYPE
the unit is not unplugged
P
OSSIBLE CAUSES
• The circuit board may be defective.
• The fuse may be defective.
• The damper actuator
integrated damper mechanism may
be defective.
• The circuit board may be defective.
• The wires may be in reverse position.
• The wires may be broken.
• The wire in the wall OR
the wall control may be defective.
• The wires may be in reverse postion.
• The Dehumidistat or push button
may be defective.
A
CTION
Replace the entire port assembly
(fresh air from outside port)
Go to point 2
• Close the door and press once on the
integrated control push button to reset the unit
• Go to 5 B, C, D, or E
Y
OU SOULD TRY THIS
• 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.
• Check if fuse F1 (located on the PCB) is blown. In that case,
replace fuse F1 as per product nameplate.
or the • Unplug the unit. Disconnect the main control and the
auxiliary control(s) (if need be). Wait 10 seconds and plug
the unit back. Check if the damper opens. If not, use a
multimeter and check for 24 VAC on J12-1 and J12-2 (on
circuit board). If there is 24 VAC, replace the entire damper
assembly.
NOTE: It is normal to experience a small delay (7-8 seconds)
before detecting the 24 VAC signal at starting-up.
This signal will stay during 17-18 seconds before
disappearing.
• If there is no 24 VAC, replace the circuit board.
• Ensure that the color coded wires have been connected to
their appropriate places.
• Inspect every wire and replace any that are damaged.
• Remove the wall control and test it right beside the unit
using another shorter wire. If the wall control works there,
change the wire. If it does not, change the wall control.
• Ensure that the color coded wires have been connected to
their appropriate places.
• Jump the
terminals. If the unit switch
to high speed, remove the
Dehumidistat or 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
Dehumidistat or the push button.
25
U
NIT STATUS
Unit works but will defrost
frequently
Unit does not work
Unit does not work
NO C NC I OC OL Y R G B
VE0097
OL and OC
NO C NC I OC OL Y R G B
VE0098