Troubleshooting - Broan ERVS100S Installation And User Manual

9 Troubleshooting

Risk of electric shocks. Electronic board connections must be checked by qualified personnel only.
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.
P
ROBLEMS
1 Unit does not start.
LED blinks rapidly on
2 push button and unit
(motor error).
LED blinks slowly on push
button and unit (RH and
temperature sensor error).
3
The wall control does not
4
work.
Unit lets too much
moisture entering
5
the building during
ventilation.
Unit stops ventilating too
6
often.
P
OSSIBLE CAUSES
• No power to power outlet.
• Unit door not properly closed.
• PCB plastic holder tabs unclipped.
• Motor harness damaged or
misconnected.
• Defective PCB, motor assembly or
low speed capacitor.
• RH and temperature sensor
misconnected.
• Defective RH and
temperature sensor.
• Unit not compatible with control.
• The wires may be in reverse position.
• The wires may be misconnected.
• The wires may be broken.
• Defective wall control.
• Unit backdraft damper misfunction.
• Wrong setting of RH limit.
• Wrong setting of RH limit.
!
WARNING
Y
OU SHOULD TRY THIS
• Check the breaker in the distribution panel.
• Test the power outlet with another electrical device (e.g.: a
lamp). If it does not work, call an electrician.
• Ensure the unit door is properly closed.
• Ensure the PCB plastic holder tabs are engaged in their
slots and the PCB is well seated on its holder.
• Check both motor harness connections, ensure that
connectors are connected to their appropriate places, the
wires are not damaged and connector pins are not corroded.
• Open the door and push on door switch spring to reset the
error and activate the unit self test during booting sequence.
Both motors must start in high speed for 10 seconds, then go
on low speed for 10 seconds. If both motors do not go on
high speed; replace the PCB.
• If one motor does not start on high speed, inverse both motors
connection and start again the self test; if the motor still not
start on high speed, replace the motor asembly and if the
problem is now on the other motor, replace the PCB.
• If both motors run in high but not in low speed, replace the low
speed capacitor. If only one motor runs in low speed, replace
the defective motor assembly.
• Check the sensor harness connection, ensure that connector
is connected to its appropriate place, the wires are not
damaged and connector pins are not corroded.
• Open the door and push on door switch spring to reset the
error and activate the unit self test during booting sequence.
Both motors must start in high speed for 10 seconds, then go
on low speed for 10 seconds. After that, the unit will test its
temperature and RH sensor. If the LED is still blinking slowly,
replace the defective RH and temperature sensor
• Check table on page 2 for control compatibility.
• 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.
• Replace the wall control.
• Check if the unit backdraft damper is closed when the unit
is off, if not, verify the orientation of the damper assemply
("TOP" engraving on damper support must be on top),
verify if magnet is in place in the damper support, verify if
metal clip is in place on damper. Damper must open freely.
• Verify RH limit adjusment (factory setting is "N" for South
and humid climate), adjust the RH limit to "-" position to
reduce humidity limit of ventilation. Ventilation speed can be
reduced by changing mode allowing less moisture to enter
the building.
• Verify RH limit adjusment (factory setting is "N" for South
and humid climate), adjust the RH limit to "+" position to
increase humidity limit of ventilation (allowing more ventilation
time), or set the RH limit to "OFF" position to deactivate the
sensor.
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