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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.
All manuals and user guides at all-guides.com
Service Parts
Key No. Part No.
ZB80M
5
7
8
Order replacement
parts by Part No.,
not by Key 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)
ZB110M Installation Guide
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