Warnings And Cautions - Broan ZB80M Installation Manual

Page 13
Troubleshooting
Before continuing, turn off power as previously noted
in WARNING and CAUTION sections at the top of the
previous page.
Symptom: Fan does not run.
• Check for an open fuse or circuit breaker in building's
service panel.
• Check two (2) plug-in connections for Motor and its
Control are seated firmly in place.
• Check two (2) plug-in connections for Sensor and its
Control are seated firmly in place.
• Check that Blower Wheel spins freely.
Symptom: Motion mode does not operate fan at certi-
fied air flow rate.
• Check two (2) plug-in connections for Sensor and its
Control are seated firmly in place.
Symptom: Fan runs erratically.
• Check that Blower Wheel is firmly attached to Motor
shaft and both spin freely.
Symptom: Fan seems noisy.
• Check that back draft damper in fan's Duct Connector
pivots freely. Screws used to attach duct to Duct Con-
nector may prevent damper from opening.
• Check that back draft damper in wall or roof cap pivots
freely. Dampers are sometimes mistakenly painted shut
or obstructed by bird or insect debris.
Symptom: Fan does not properly ventilate room.
• For spot ventilation, turn both master switch and sensor/
control wall switch ON, so sensor/control operates fan at
certified airflow rate.
• For spot ventilation followed by continuous ventilation,
increase the "TIME" setting of user-adjustable time de-
lay.
• For continuous ventilation, increase "CFM" setting of
user-adjustable airflow rate.
Service Parts
7
8
Order replacement
parts by Part No.,
not by Key No.
Key No. Part No. Description
1 97018349 Mounting Frame
2 97018721 Knockout Plate & Screws
3 97018382 Housing
4 97018472 Wiring Panel/Harness Assembly
5 97018846 Motion Control Assembly
6 97020846 Control Assembly & Motor (ZB80M)
97020845 Control Assembly & Motor (ZB110M)
7 97018331 Duct Connector
8 99111513 6" to 4" Reducer (ZB80M only)
9 99020301 Blower Wheel
10 97019371 Scroll Assembly (ZB80M)
97018768 Scroll Assembly (ZB110M)
11 97018775 Grille Assembly (includes 12)
12 99140208 Grille Spring (2 req'd)
ZB80M ZB110M Installation Guide
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