4
MUB (Multibox) Series
Installation instructions
Systemair
Troubleshooting
1 Warnings
The following admonitions will be presented in the different sections of the document.
Danger
• Make sure that the Mains supply to the unit is disconnected before performing any maintenance or
electrical work!
• All electrical connections must be carried out in accordance with local rules and regulations.
Warning
• In order for the unit to be considered safely installed the doors if equipped with handles have to be
locked with a key to prevent unauthorized or accidental opening
• The unit must be duct connected or in some other way provided with protection so that it is not
possible to come in contact with the fans through the duct connections
• The unit is heavy. Be careful during transport and mounting. Risk of injury through pinching. Use
protective clothing.
• Beware of sharp edges during mounting and maintenance. Make sure that a proper lifting device is
used. Use protective clothing.
Caution
• If the unit is installed in a cold place make sure that all joints are covered with insulation, and tape well
• Duct connections/duct ends should be covered during storage and installation
• Do not connect tumble dryers to the ventilation system
• Take care not to damage the water battery when connecting water pipes to connectors. Use a
spanner to tighten the connection.
Topvex FR03, FR06, FR08, and FR11
Installation instructions
206638
1
Systemair AB
WARNING
Before performing any maintenance to the unit, ensure that the unit's power is disconnected and locked out.
PROBLEM
POSSIBLE CAUSE
SOLUTION
Reduced airflow
Elevated pressure in duct system.
Check duct system for obstructions.
Clean dirty filters.
Potentiometer speed control is set too low.
Adjust potentiometer.
Excessive buildup of debris on wheel.
Clean wheel.
Motor is rotating in wrong direction.
Adjust wheel rotation as shown under
"Operation" (see Page 2).
Wheel is not aligned properly.
Adjust wheel so it is centered on inlet.
Excessive noise/vibration
Wheel is not balanced.
Clean all debris from wheel. Verify wheel balance
and contact supplier if necessary.
Wheel is not aligned properly and rubbing
against casing.
Adjust wheel so it is centered on inlet.
Foreign objects are located inside the wheel
or casing.
Remove objects. Verify wheel balance and check for
possible damage. Contact supplier if necessary.
Fan has stopped
Incorrect supply voltage or current.
Verify that supply voltage/current match
nameplate values.
Fuse has blown
Replace with a new fuse. Verify that the new
fuse is sized correctly.
Breaker has tripped.
Reset the breaker.
Motor has overheated.
See "Thermal Overload Protection" (Page 2).
Motor is blocked.
See "Thermal Overload Protection" (Page 2).
