Troubleshooting; Service Parts - NuTone ZN110HL Guia De Instalacion

Page 13

Troubleshooting

Before continuing, turn off power as previously noted in WARNING
and CAUTION sections on 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: Humidity mode does not operate fan at certified 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 Connector 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 delay.
• For continuous ventilation, increase "CFM" setting of user-
adjustable airflow rate.

Service Parts

7
Order replacement
parts by Part No.,
not by Key No.
5
Key No. Part No. Description
1 97018349 Mounting Frame
2 97018721 Knockout Plate & Screws
3 97018382 Housing
4 97018474 Wiring Panel/Harness Assembly
5 97019014 Humidity Control Assembly & Grille Assembly
(includes 10, 11)
6 97018756 Control Assembly & Motor
7 97018331 Duct Connector - 6"
8 99020301 Blower Wheel
9 97018768 Scroll Assembly
10 99140208 Grille Spring (2 req'd)
11 99111542 Lens
12 99271381 Bulb, GU24 18W 3500K Fluorescent (2 req'd)
ZN110HL Installation Guide
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