Broan HRVH100S Installation Manual page 20

9. T
(
ROUBLESHOOTING
P
ROBLEMS
The VB60W push button
timer does not work OR
its indicator light does not
stay on.
7
The motor does not work.
8
The defrost cycle does
not work (the fresh air
duct is frozen) OR the
9
fresh air distributed is very
cold.
The integrated defrost
10 control push button does
not work.
If the problem is still not solved, call our Technical Support: 1-800-543-3055.
' )
CONT D
P
OSSIBLE CAUSES
• The wires may be in reverse
postion.
• The VB60W button may be
defective.
• The fuse may be defective.
• The motor may be defective.
• The motor or capacitor
may be defective.
• Ice deposits may be hindering
the damper operation.
• The damper rod or the port
damper itself may be broken.
• The damper actuator or circuit
board may be defective.
• The 30-second boot sequence
is not completed.
Y
OU SOULD TRY THIS
• Ensure that the color coded wires have been connected to their
appropriate places.
• Jump the OL and OC terminals.
If the unit switch to high speed,
remove the VB60W 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 VB60W push button.
• Check if fuse F1 is blown. In that case, replace fuse F1 as per
product nameplate.
NOTE: Refer to Section 6 Wiring diagram.
• If the voltage reading is 120 VAC on J4, change the defective
motor.
• Using a multimeter, check the ohms value on motor connector.
For BLUE and BLACK motor wires, the right value is ± 43 ohms.
For BLUE and BROWN motor wires, the right value is ± 48
ohms. For BROWN and BLACK motor wires, the right value is
± 91 ohms. If the ohms values are the same, the motor is not
defective. Replace the motor capacitor.
• Remove the ice.
• Inspect these parts and replace if necessary.
• See point 5.
• See Section 4.1 Booting Sequence.
20
NO C NC I OC OL Y R G B
VE0098