NuTone ZN110ML Instruction Manual download pdf (Page 13)

ZN80ML n ZN110ML Installation Guide

Page 13

Troubleshooting

Before continuing, turn off power as previously noted in

WARNING section on the previous page and CAUTION

section at the top of this 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

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.

Cleaning and Maintenance

To Clean

For quiet and efficient operation, long life and attractive ap-

pearance, remove Grille and vacuum interior of unit with a

dusting brush attachment.

Do not use cleaning sprays, solvents or water on, or near,

the sensor.

Motor is permanently lubricated and never needs oiling.

If motor is making excessive or unusual noises, replace

Control Assembly and Motor.

To Change Bulbs

Refer to Retrofit Installation Step

14 (page 11).

1. Carefully insert a small

flathead screwdriver between

the Grille and Lens, then twist

to remove Lens.

2. Purchase two (2) 18W (max.)

type GU24 fluorescent lamps

with Maximum Overall Length

(MOL) of 3.9” (100 mm).

Purchase a 4W (max.) C7-

type incandescent night light bulb.

3. Insert bulbs into their sockets. Replace Lens.

M.O.L.

3.9" (100 mm)

CAUTION

IN ORDER TO PREVENT MOTOR/CONTROL DAMAGE:

DO NOT remove motor plug to stop spinning motor.

Power must be disconnected (see WARNING on previous

page) before motor plug is removed or inserted into control

assembly.

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NuTone ZN110ML Instruction Manual Page 13

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