Troubleshooting - Venmar K7 HRV User's And Installer's Manual

For the Installer

9. TROUBLESHOOTING

Risk of electric shocks. Electronic board connections must be checked by qualified personnel only.
• Unplug auxiliary controls
• Uplug unit
• Wait 1 minute. During this me, open the door.
Unit does not work
• Plug unit back. Beware of live and moving parts.
• Unit performs a 30-second boo ng sequence. Can you hear the relays and
Is the power outlet
No
Refer to an
electrician.
Is the fuse on the
Yes electronic board
the unit and contact
technical support.
Use a voltmeter.
Is there 24 VAC
between J5-1 and
J5-2?
Replace the
Yes
electronic board.
Replace the damper
assembly.
Service technicians only: If you require assistance or have questions after performing the above troubleshooting, call: 1-800-649-0372.
see the dampers move?
No
energized?
Yes
blown?
Use a voltmeter.
Is there 120 VAC
No
between J4-1 and
J4-2?
Yes No
Power cord is
No defec ve. Call
technical support.
⚠
WARNING
yes
Replace the damper
assembly.
Connect the GREEN and BLACK op onal control wires.
Reboot unit. Once the boo ng sequence is completed,
unit should start in high speed.
Does the unit now work at high speed?
Using a mul meter, verify that there is an ohm
value on the motor connector are as follows:
Between BLUE and BLACK wires
Between BLUE and BROWN wires
Between BROWN and BLACK wires
Is there an ohm value on all three connec ons?
No
Replace the motor
and the start
capacitor.
14
Yes
Does the damper
motor run beyond
the 30-second
boo ng sequence?
No
Yes
Yes
Replace the board.
No
Replace the motor.