TACOFLOW3 MAX / MAX PRO
38
Instructions for installation and use
MKTG-TRA-MAN-E9135400-07/2019-ENG
12.2.8 PWM INPUT
The circulator operates at variable speed according to the incoming duty cycle.
The input signal shall be a square wave with a frequency between 200 Hz and 5 kHz and an amplitude between 5 V
and 12 V.
With a duty cycle between 0 and 98%, the circulator operates at variable speed:
- 0% with a duty cycle of less than 5%
- 50% with a 50% duty cycle
- 100% with a duty cycle of less than 95%
INFORMATION
WITH A DUTY CYCLE OF 100%, THE CIRCULATOR IS NOT ABLE TO RECOGNIZE THE SIGNAL AS A PWM INPUT AND THEREFORE
THE WORKING SPEED DEPENDS ON THE INPUT VOLTAGE, AS IN THE CASE OF THE 0-10 V INPUT.
12.2.9 ANALOG OUTPUT
The circulator has an analog output to indicate the operating status and the presence of any errors.
Voltage
State
0 V
Circulator off, not powered
2 V
Circulator powered in standby
4 V
Circulator on and running
6 V
Warning presence (overheating, air)
10 V
Alarm presence (Circulator blocked, undervoltage, overtemperature)
TAB. 21 (Analog output)
12.2.10 ERRORS LIST (MAX PRO MOD.)
The presence of errors is indicated by the red LED (in
MAX PRO mode
the LED of the operating status turns red) and
by the
“error code”
on the display
(see TAB. 22)
.
Code
Meaning
Circulator status
E1
Pump locked / loss of step
Stop
E2
Undervoltage
Stop
E3
Overheating warning
It operates in limited power
E4
Overheating alarm
Stop
E5
Communication with inverter card is interrupted
It works in recovery mode
E6
SW cards error. Pumps are incompatible with each other
It works in recovery mode
TAB. 22 (Code and meaning of the error)
