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
Summary of Contents for CB1 TAC3 CA
Page 4: ...4 APPENDIX Wiring diagram ...
