KEF Ci3-80QT User Manual

KEF Ci200.3QT, CiFDT, & Ci3-80QT Trouble shooting Guide
The majority of reported problems with the Ci200.3QT, Ci3-80QT and the CiFDT are
related to one of two possible issues; either poor quality / undersized power supply OR
faulty control wiring. Please see the wiring diagrams at the end of this document for
proper control wiring. For the Ci200.3QT there is one additional potential issue related
to the limit switches.
Please note that the main power supply must always remain energised or the speaker
may drop to the open position.
All Models:
1) Although the units will work with a 12volt power supply that has 350mA
available per connected speaker, the system will work much better if a larger
power supply is used to provide some head room. We suggest a minimum of
400mA be available per speaker. It is important that a high quality supply be
used that has less than 150mV AC Ripple.
2) Two of the most common problems found with faulty system wiring are;
a. Power supply is connected with polarity reversed. This will likely
damage the control board and require the need to replace the control
board.
b. When using a 12V trigger from a surround receiver not connecting both
the negative lead from the 12V trigger and 12V power supply to the
black (negative) power wire on the speaker. This will cause
unpredictable and hard to diagnose behaviour.
Ci200.3QT Only: Limit Switch Problem.
3) If there is a limit switch problem then when the product was 1st installed and
tested it would have behaved properly when rapidly cycled. But if one of the
two limit switches is out of alignment then power to the motor would not shut
off properly and after remaining in this mode for a while thermal protection on
the board will engage.
To test this condition, shut off both the 12volt power supplies and let sit for
approx. 5 minutes. Reconnect power and the motor should then function
properly if the speaker is cycled. You must check and adjust the limit switches
or the problem will reoccur.
There are two possible reasons why the limit switch problem is happening. One
is that one or more corners of the product were over tightened when installed
and this is causing excessive flexing of the mounting frame which is pushing
the product out of alignment. Adjust the mounting screws if this is the problem.
The other potential reason is that the limit switches were set too close to one end
of their tolerance and the normal flexing of the products when installed is
causing them to not engage properly. This is very uncommon on the .3 version
of the Ci200QT
www.KEF.com

KEF Ci3-80QT Specifications

General

Tweeter	Yes
Speaker type	3-way
Woofer diameter	75 mm
Tweeter diameter	15 mm
Number of drivers	3
Speaker placement	In-wall/in-ceiling
Audio output channels	1.0 channels
Number of woofer drivers	2
Number of tweeter drivers	1
Product color	White
Recommended usage	Universal
Impedance	8 Ω
Sensitivity	87 dB
Frequency range	87 - 27000 Hz
RMS rated power	100 W
Crossover frequency	300 Hz
Equalizer	No
Connectivity technology	Wired

Weight and Dimensions

Depth	125 mm
Width	377 mm
Height	128 mm

Summary

General Power Supply and Wiring Guidelines

Power Supply Requirements

Recommends a minimum 400mA 12V supply with low AC ripple for optimal speaker performance.

Common Wiring Errors

Highlights polarity reversal and incorrect 12V trigger wiring as common issues that can cause damage or erratic behavior.

Ci200.3QT Limit Switch Troubleshooting

Limit Switch Malfunction Symptoms

Describes issues where limit switches fail to trip, leading to motor faults and thermal protection engagement.

Closed Position Adjustment

Details the 1-2mm gap requirement for the closed position and methods to adjust the limit switch.

Open Position Adjustment

Explains how to adjust the lower limit switch for the open position by bending the lever for proper roller alignment.

Ci200.3QT Specific Notes

Motor Speed Compatibility

Notes that Ci200.3QT motors are slower than Ci200.2QT and should not be mixed in the same installation.

Wiring Diagrams

12V Trigger Wiring

Illustrates connections for a 12V trigger, emphasizing correct polarity for the trigger and power supplies.

Switched Outlet Wiring

Shows a diagram for wiring using a switched outlet, including a relay and diode for control.