Titon CME3Q+ Owner's manual

PAGE 1OF 10 FAULT FINDING FOR CME3Q+ ISSUE 1 03/04/20
894 The Crescent, Colchester Business Park, Colchester, Essex, CO4 9YQ United Kingdom Tel: [phone]
Fault Finding
CME3Q+ Units With Volt Free Switching
This document covers part numbers
TP332A & TP332HA

PAGE 2OF 10 FAULT FINDING FOR CME3Q+ ISSUE 1 03/04/20
894 The Crescent, Colchester Business Park, Colchester, Essex, CO4 9YQ United Kingdom Tel: [phone]
Contents
Unit Identification.........................................................................................................................................................3
Product Features ..........................................................................................................................................................3
Auto Setback Speed..................................................................................................................................................3
Setback Speed...........................................................................................................................................................3
Continuous Speed.....................................................................................................................................................3
Boost Speed with Overrun Timer .............................................................................................................................3
Boost Overrun Timer ................................................................................................................................................4
Integrated Humidity Sensor .....................................................................................................................................4
Wiring Diagrams ...........................................................................................................................................................4
PCB Configuration/Setting............................................................................................................................................5
Dismantling...................................................................................................................................................................6
Fault Finding .................................................................................................................................................................7
Unit Not Running......................................................................................................................................................7
Unit Will Not Boost...................................................................................................................................................7
Unit Slows Down When Boosted..............................................................................................................................7
Unit Will Not Drop Out Of Boost ..............................................................................................................................7
The unit is running at a speed that is not Continuous, Boost Or SetBack................................................................8
Excessive Unit/System Noise....................................................................................................................................8
Insufficient Airflow ...................................................................................................................................................8
Condensation/Mould Within House.........................................................................................................................8
Condensation/Moisture Forming In Or On Ducting .................................................................................................8
Unit Not Storing The Commissioning Settings..........................................................................................................8
Unit Will Not Stay In Place Without The Additional Fixing Screws...........................................................................8
Both Continuous and Boost Speeds Have Changed .................................................................................................9
Unit Not Running......................................................................................................................................................9
Fig 1 Fan Mains & Low Voltage Molex Connector........................................................................................................9
Fig 2 Molex Connector..................................................................................................................................................9
Fig 3 Testing PCB Inputs..............................................................................................................................................10
Fig 4 Programming Link ..............................................................................................................................................10
Fig 5 Boost Link...........................................................................................................................................................10

PAGE 3OF 10 FAULT FINDING FOR CME3Q+ ISSUE 1 03/04/20
894 The Crescent, Colchester Business Park, Colchester, Essex, CO4 9YQ United Kingdom Tel: [phone]
Unit Identification
All maintenance/fault finding/repairs must be completed by a competent person.
Safe isolation procedures must be followed when working on these units.
Product Features
Model
CME3 Q +
Part Number
TP332A
TP332HA
Setback Speed (Set Automatically)
●
Setback Speed
●
Continuous Speed
●
Boost Speed
●
Boost Overrun Timer
●
Integrated Humidity Sensor
●
Auto Setback Speed
Setback Speed is a reduced ventilation rate. Auto Setback Speed is automatically set at the mid point between
minimum possible Continuous Speed and the selected Continuous Speed. The Auto Setback Speed can be
enabled by connection of a volt-free one-way switch, or combined with the Boost Speed with the 3 position
switch TP 508.
Setback Speed
Setback Speed is a reduced ventilation rate. Setback Speed is configured using a step-less independent fan
control potentiometer. The Setback Speed can be enabled by connection of a volt-free one-way switch, or
combined with the Boost Speed with the 3 position switch TP 508.
Continuous Speed
Continuous Speed is the normal running speed of the unit. Continuous Speed is configured using a step-less
independent fan control potentiometer.
Boost Speed with Overrun Timer
Boost Speed is an increased speed providing higher extract air flow. Boost Speed is configured using a step-less
independent fan control potentiometer. The Boost Speed can be triggered by any device which provides a volt-
free one-way switch, such as a PIR, thermostat, humidistat or a standard one-way switch

PAGE 4OF 10 FAULT FINDING FOR CME3Q+ ISSUE 1 03/04/20
894 The Crescent, Colchester Business Park, Colchester, Essex, CO4 9YQ United Kingdom Tel: [phone]
Boost Overrun Timer
Boost Overrun Timer maintains the Boost Speed for a specific time variable between 0 and 30 minutes. The Boost
Overrun Timer time is configured using step-less independent potentiometer.
Integrated Humidity Sensor
There are two variations, the function slightly varies depending upon the software on the control PCB.
If the firmware on the PCB is FW0020-0100, then
This continuously monitors the relative humidity (RH) of the extracted air and triggers Boost Speed when the
relative humidity rises over the set threshold. The Humidity Sensor’s trigger point is variable from 55%RH to
85%RH and is configured using step-less independent potentiometer.
If the firmware on the PCB is FW0020-0200, then
This continuously monitors the relative humidity (RH) of the extracted air. The fan speed increases proportionally
between Continuous & Boost Speed depending on the measured %RH.
.
The Humidity Sensor’s set point is variable from 55%RH to 85%RH and is configured using a potentiometer.
Wiring Diagrams

PAGE 5OF 10 FAULT FINDING FOR CME3Q+ ISSUE 1 03/04/20
894 The Crescent, Colchester Business Park, Colchester, Essex, CO4 9YQ United Kingdom Tel: [phone]
PCB Configuration/Setting
TP332A
TP332HA

PAGE 6OF 10 FAULT FINDING FOR CME3Q+ ISSUE 1 03/04/20
894 The Crescent, Colchester Business Park, Colchester, Essex, CO4 9YQ United Kingdom Tel: [phone]
Dismantling
Cover removal
Remove the lid by unscrewing the two
screws
Caution This will then expose the control
PCB and mains terminal.
Mains cable clamping
Mains terminal Above
Remove the mains cable and the boost
cable(s).
Safety lockout procedure must be followed
prior to disconnecting the mains from the
unit.
Removal of the Top Scroll.
The scroll top is retained with six clips, some
units may also use the four screw fixing
points.
To remove the scroll Top first remove and
retain the screws (if fitted). Place a large flat
bladed screw driver into the slot adjacent to
the clip and gently push the screw driver
handle towards the centre of the unit (motor)
whilst and at the same time easing the Scroll
Top away from the base, this will disengage
the clip. Repeat for the other five clips.
Tip, disengage the clips adjacent to the
Output Ports last to aid easier removal of the
Scroll Top. Re assemble is the revers of the
above. Ensure the clip holes are resealed
with self-adhesive aluminium tape.

PAGE 7OF 10 FAULT FINDING FOR CME3Q+ ISSUE 1 03/04/20
894 The Crescent, Colchester Business Park, Colchester, Essex, CO4 9YQ United Kingdom Tel: [phone]
Fault Finding
Unit Not Running
1. How are you determining the fan is not running? The fan may be running but is so quiet it is not audible.
oCheck flow rates at ceiling terminals
oIncrease fan speed, to see if it then becomes audible.
2. Check 230v is present at terminal block, Fig 1.
3. Check motor Molex connector is firmly located onto the PCB, Fig 1.
4. Check fan runs (connect a 10KΩ potentiometer as fig 2), turning the potentiometer will adjusts the fan
speed from max to min or vice versa.
5. Check resistance across the switch input terminals on PCB (this checks if the circuit has been damaged
and caused a knock on affect to damage the PCB operation). Fig 3
6. Is the fan stopped by an obstruction?
Unit Will Not Boost
1. Is the unit in program position, the unit will not respond to a boost input or humidity when in the programing
position? The unit needs to be in the run position Fig 4
2. If using momentary switches, is over run timer set to zero?
3. Is it actually boosting but the boost speed is just higher or the same as continuous, therefore no audible
difference.
oCheck flow rates at continuous and boost to see if there is a difference.
oChange units speed to determine if difference is then audible.
Unit speeds can be determined by looking at the top of the relevant
potentiometer and seeing where the arrows point. If the arrows on
the continuous and boost pots are in the same or similar positions
the flow rates and noise will be similar.
Turning Anticlockwise –decreases speed
Turning Clockwise –increases speed
4. Is the unit already running at full speed.
5. Is a boost switch fitted?
6. Is the boost switch providing a connection across the boost terminals?
oDisconnect the boost wires and check for continuity, with a continuity tester or multimeter.
oFunction can be tested by bridging the terminals, using a link wire, Fig 5.
7. Check resistance across boost terminals on PCB (this checks if the switch input circuit has been damaged
and caused a knock on affect to damage the PCB operation), fig 3.
Unit Slows Down When Boosted
Boost speed has been set lower than continuous, check commissioning speed set up.
Boost cables have been connected to set back terminals. See wiring diagrams
Unit Will Not Drop Out Of Boost
Before commencing any checks complete the following:-
A. Make a note of where the overrun timer is set, then set to
minimum
B. Make a note of where the humidity is set, then set to maximum
C. Switch the unit off for 20 seconds, then back on.
Has this resolved the problem? If not:-
0 to 30
mins
55% to 85%
Hum.
1. Is the unit in program position, if the boost speed was the last speed set it will stay at that speed, fig 4.
2. Are all boost switches off
3. Is it actually dropping out of continuous but the boost speed is just higher or the same as continuous,
therefore no audible difference.
oCheck flow rates at continuous and boost to see if there is a difference.
oChange units speed to determine if difference is then audible.
4. Is the boost switch cabling providing a permanent connection across the boost terminals?
oDisconnect the boost wires and switch the unit off for 20 seconds then restart.
5. Has 230v has been inadvertently applied to the boost terminals –control circuitry has been damaged.
Check as Fig 3
N.B. If the mains cable and boost cables are run in close proximity it is possible the 230v can induce a voltage
into the boost cables and result in the unit not dropping out of boost. Five core cable –live, neutral, earth
and two for boost must not be used. Min 50mm segregation required.

PAGE 8OF 10 FAULT FINDING FOR CME3Q+ ISSUE 1 03/04/20
894 The Crescent, Colchester Business Park, Colchester, Essex, CO4 9YQ United Kingdom Tel: [phone]
The unit is running at a speed that is not Continuous, Boost Or SetBack
1. Is the firmware on the PCB is FW0020-0200, if yes it is probable that the speed is ramping up/down due
to humidity.
Excessive Unit/System Noise
1. Is the unit providing the correct airflow, as calculated in Approved Document Part F? If set to high it may be
possible to slow down the fan, thus reducing noise.
2. Is the unit capable of achieving the required levels at an acceptable speed. The higher the speed the
greater the noise!
3. Is the unit permanently in boost?
4. Has the system been installed to the design?
5. Has the system been designed to minimise noise?
6. Is the ducting system fitted to minimise system resistance, including suitable external terminal, duct sizes
and duct type?
7. Is the ducting system sealed to minimise air leakage?
8. Is the unit correctly fitted to stop leakage? Have all fixing screws been fitted?
9. Is there excessive noise from the fan/motor? E.g. bearing noise
Insufficient Airflow
1. Is the unit set to the correct flow rates i.e. commissioned?
2. Has the unit sufficient capacity for the dwelling requirements?
3. Has the system been installed to the design?
4. Is the design balanced?
5. Is there excessive resistance in the system?
6. Are the ceiling terminals closed?
7. Have the correct duct sizes been used?
8. Is the ducting system blocked/damaged?
9. Is there air leakage in the ducting system, is it sealed?
10.Is there air leakage from the unit?
11.Is there sufficient clearance under internal doors?
12.Is the unit correctly fitted to stop leakage? Have all fixing screws been fitted?
Condensation/Mould Within House
1. Is the unit being switched off, it must run 24/7
2. Where fitted, are trickle vents being left open?
3. Is the Boost function available and being used? N.B. not required in all properties depending upon
calculations.
4. Are flow rates being achieved?
oUnit not commissioned, N.B. standard rates may not be sufficient, dependent upon lifestyles.
oSystem is unable to provide sufficient air flow (refer to fault –insufficient air flow).
Condensation/Moisture Forming In Or On Ducting
Is duct insulated as required, DVCG statement:-
Does duct slope away from the unit, DVCG statement:-
Unit Not Storing The Commissioning Settings
1. Has the power to the unit been switched off before the link has been moved from the Program to the Run
mode.
Unit Will Not Stay In Place Without The Additional Fixing Screws
1. Check the parts clip together correctly without the additional fixing screw. If they do not clip together
correctly it is possible the First Fix Base is twisted as it is not on a flat substrate. Undo the fixing screws and
re check the fitting.

PAGE 9OF 10 FAULT FINDING FOR CME3Q+ ISSUE 1 03/04/20
894 The Crescent, Colchester Business Park, Colchester, Essex, CO4 9YQ United Kingdom Tel: [phone]
Both Continuous and Boost Speeds Have Changed
HA Model
The unit has re-set itself to factory setting, continuous is at %50 and boost is at 100%. This has probably
occurred after a power surge or a power outage. Try Re-commissioning.
A Models
The unit has re-set itself to factory setting, continuous is at %14 and boost is at 100%. This has probably
occurred after a power surge or a power outage. Try Re-commissioning.
Unit Not Running
1. How are you determining the fan is not running? The fan may be running but is so quiet it
cannot be herd.
a. Check flow rates at ceiling terminals
b. Increase fan speed, to see if it then becomes audible.
2. Check 230v is present at terminal block fig 1.
3. Check motor connector is firmly located onto the PCB fig 1.
4. Check fan runs (connect a 10KΩ potentiometer as fig 2 to the fan connector), turning the
potentiometer will adjusts the fan speed from max to min or vice versa.
5. Check resistance across boost terminals on PCB (this checks if the boost circuit has been
damaged and caused a knock on affect to damage the PCB operation, see fig 3).
6. Is the fan stopped by an obstruction?
Fig 1 Fan Mains & Low Voltage Molex Connector
Mains terminal
Fan Molex connector
Fig 2 Molex Connector
Potentiometer Connections
Fan Connector
A - 10V, B - 0V, C - PWM & D - Tacho
PCB Connector
If this is not possible, try bridging the A and C terminals on the fan connector, the fan should then run
at full speed.

PAGE 10 OF 10 FAULT FINDING FOR CME3Q+ ISSUE 1 03/04/20
894 The Crescent, Colchester Business Park, Colchester, Essex, CO4 9YQ United Kingdom Tel: [phone]
Fig 3 Testing PCB Inputs
Measure resistance across the terminals, this is easier across the
soldered joints rather than the terminals block.
If reading is open circuit, it is probable that 230v has been
applied.
If reading is approx. 15kΩ, then the circuit is ok.
This only checks the switch input circuits and does not prove overall functioning
i.e. PCB may still be faulty if reading is approx. 15kΩ
Damage to component
Fig 4 Programming Link
Header Link in the Program position
Header Link in the Run poistion
Fig 5 Boost Link
Boost Link