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8
3. MAINTENANCE (CONT’D)
3.2 ANNUAL MAINTENANCE (FALL)
Repeat steps 1 to 6 from the previous section and continue with the following steps:
1. Clean the heat recovery core:
• Remove core.
• Let it soak in a mixture of cold or lukewarm water and mild soap (dishwashing liquid).
• Rinse thoroughly.
• Shake the core to remove excess water and let it dry.
2. Clean blower assembly.
• Remove dust using a vacuum cleaner with a soft brush attachment.
3. Reassemble the components.
4. Reconnect power supply.
CAUTION
Handle the heat recovery core with care.
4. TROUBLESHOOTING
PROBLEM YOU SHOULD TRY THIS
1. Nothing works. • See if the unit is plugged in.
• See if the unit is receiving power from the house
circuit breaker or fuse.
2. Noisy unit. • Clean the unit (see Section 3). If the problem is not
solved, contact your installer.
3. Condensation on windows (air too
humid).
• Operate the unit at maximum speed (MAX.) during
activities generating excess humidity (family
gatherings, extra cooking, etc.).
• Leave curtains half-open to allow air circulation.
• Store all firewood in a closed room with a dehumidifier
or in a well ventilated room, or store the wood outdoors.
• Keep the temperature in your house above
18°C (64°F).
4. Air too dry. • Operate the unit at low speed (MIN.).
• Temporarily switch to the intermittent mode (if
available).
• Temporarily use a humidifier.
5. Air too cold at the air supply grille. • Make sure the outdoor hoods are not blocked.
• Operate the unit at low speed (MIN.).
• Have the system’s balancing checked.
• Have the unit’s defrost system checked.
• Install a duct heater.
For wall controls problems, refer to the Troubleshooting section in the Main and auxiliary wall
controls user guide (included with the ventilation unit and also available at www.broan.com).
If the problem is still not solved, contact your installer.
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