Swegon CB1 TAC3 CA Guide

1
CB1 TAC3 CA - ALARMS
Technical documentation (v.10/2007)
The control box CB1 TAC3 CA features 4 alarms:
- an alarm on pressure rise.
- an alarm on fan failure.
- initialisation alarms.
- alarm of non respect of the assignment.
Wiring diagram: see appendix.
1. overpressure alarm.
This alarm indicates a variation of calculated pressure on the fan with regard to the value of the initialized pressure of
reference. The alarm levels are calculated using the system curve principle.
When this alarm is activated: :
- LED Alarm on CB is on.
- PRESSURE ALARM appears on the screen.
- Relay R2 of the optional SAT3 is closed.
- LED above realy R2 of option SAT3 is on.
Example of Initialisation of pressure alarm
It is very important to install the fan properly in the real working conditions.
The setup is done accordingly to the configuration sequences of the control circuit:
1) Setting of the ∆Pa increment; suppose ∆Pa=80Pa (for instance maximum filter pressure)
Entrer this value during the initialisation procedure. This value will be added to the reference pressure resulting from the
reference airflow chosen hereunder.
2) Initialisation of the reference pressure:
During initialization sequence select NEW Pa REF ? YES then press ENTER.
Suppose (m³h INIT)= 1250 m³/h, enter this value then press ENTER.
The fan will start running and reach this value, whatever the status of K1/K2/K3 is.
While reaching the reference working point the display shows the following instant values:
Pa REF INIT
xxxx m³h and xxxx Pa.
and LED Alarm is blinking.
When reference airflow (1250 m³/h) is reached, the actual pressure (for example 122 Pa) is memorized and the alarm
reference point becomes 1250 m³/h - (122+80)Pa. The fan starts to run as programmed.
4 types of problems could occur while doing this:
Text displayed
Description
FAN ALARM
CHECK POWER
SUPPLY AND
CABLES CONNECT.
THEN PRESS
ON RESET.
IF NOT SOLVED
REPLACE CABLE
OU CB OU MOTOR
Describes a fan function default. Check wiring, connections and 230V supply.
Otherwise the problem can be caused by defective wire, control circuit or motor.
(text is displayed on several successive screens).
Alarm LED is lit, relay R1 is closed and relay LED is also lit.
Pa INIT ALARM
AIRFLOW TOO LOW
DUE TO TOO HIGH
PRESSURE
REDUCE PRESSURE
OR FLOW
Actual airflow < requested airflow: the requested airflow is located at a pressure
level the fan cannot reach. Change the air system, or the airflow requested, or a
use bigger fan. (1)
Text is displayed on several successive screens

2
RESTART Pa INIT
VIA THE SETUP.
PRESS ON
RESET.
Pa INIT ALARM
AIRFLOW TOO HIGH
MINIMUM MOTOR
LIMIT ACHIEVED
SET HIGHER
AIRFLOW THEN
RESTART Pa INIT
VIA THE SETUP.
PRESS FIRST ON
RESET.
This alarm sihnals that the nominal airflow requested cannot be reached
because the lower boundary of the fan’s working range is reached. (1)
Text is displayed on several successive screens
Pa INIT ALARM
Pa NOT STABLE.
CHANGE WORKING
POINT. THEN
PRESS ON
RESET.
Pressure too unstable. Change the air system or airflow request. (1)
Text is displayed on several successive screens
(1) Alarm LED is ON, relay R1 is in alarm status, LED of relay is ON.
Paref cannot be defined and motor sets itself in “softstop”. To restart, press RESET until the alarm LED shuts off. The CB
will operate normally but without a configured alarm pressure. If you wish a pressure alarm anyway, determine the cause
(system pressure or configuration, airflow, working zone of fan,…) and start again.
2. Fan running alarm
Text displayed
Description
FAN ALARM
CHECK POWER
SUPPLY AND
CABLES CONNECT.
THEN PRESS
ON RESET.
IF NOT SOLVED
REPLACE CABLE
OU CB OU MOTOR
Describes a fan function default. Check wiring, connections and 230V supply.
(text is displayed on several successive screens).
Alarm LED is lit, relay R1 is closed and relay LED is also lit.
Check wiring, connections and 230V supply. Otherwise the problem can be
caused by defecti wire, control circuit or motor

3
3. Data error alarm
Text displayed
Description
DATA ERROR
This alarm indicates an error in the data of the control circuit. If this error
occurs, Alarm LED is lit, relay R1 is closed and relay LED is lit.
To solve this problem :
- Make a « factory reset » using the advanced setup (to activate press keys
SETUP and ENTER simultaneously until text “ADVANCED SETUP” appears
on the screen. Select “factory reset” and press enter.
- If not solved circuit has to sent back for a factory reprogramming.
4. Alarm for impossibility to execute the airflow assignment
2 different situations can occur :
- The airflow requested cannot be held constant because the counterpressure on fan is too high :
Text displayed
Description
CA ALARM
AIRFLOW TOO LOW.
REDUCE PRESSURE
ON THAT FAN.
This alarm means the requested airflow cannot be reached.
(text is displayed on several successive screens).
Requested airflow cannot be held constant because the counterpressure on the
fan is too high.
- It is activated if actual airflow < 93% of requested airflow and
- Deactivated once airflow reaches value > 97% of requested airflow
- The airflow requested cannot be held constant because the airflow is too low for the working range of the fan:
Text displayed
Description
CA ALARM
AIRFLOW TOO HIGH
MINIMUM MOTOR
LIMIT ACHIEVED
This alarm signals that The airflow requested cannot be held constant because
the airflow is too low for the working range of the fan.
Activated when airflow is > 112% of requested airflow
Deactivated when airflow < 108% of requested airflow .
The text appears on different successive screens.

4
APPENDIX –Wiring diagram