Xylem IM224 User Manual

INSTRUCTION MANUAL

IM224R03

®

Hydrovar

Variable Speed Control HV, 2 HP – 15 HP VERSION 0307

SERVICE MANUAL

Commercial Water

Section A

Troubleshooting the Control Card (using a Multimeter).

Power Supply disconnected!!!

Xylem Inc.

GND Connection to Power Unit
(attached via the screws)

The following tests have to be made without connected cables.

1) Internal Resistance – Digital Inputs:

Low Water
X3/1 (GND) – X3/11
=> 90k Ω / 2.5M Ω

External ON/OFF (release)
X3/1 (GND) – X3/7 => 14k Ω

Configurable Digital Input (Digi 1):
X3/1 (GND) – X3/9 => 14k Ω

Digital Inputs (Dig 2 /Dig 3 /Dig 4):
X3/1 (GND) – X3/5 / 6 / 15
=> 20k Ω

2) Internal Resistance of the Analogue
Current Inputs:

(Sensor 1/2 - Req. Val 1/2)

X3/1 (GND) – X3/2 / 4 / 18 / 23 =>50 Ω

3) Capacity of Electronic Ground to Earth:

X3/1 (GND) – earth => 60nF

Important to bleed off Hf- Disturbances!

X3X3

24 +24V

23

22

21

20

19 +10V

18

17

16

15

14

13

12

11

10

9

8

7

6

5

4

3 +24V

2

1

Additional power supply ** max. 100 mA

Current signal input (required val. 2)

0-20mA / 4-20mA [Ri=50Ω]

Analog output 2 4-20mA [Ri=500Ω]

Analog output 1 0-10 VDC

Current signal input (required val. 1)

0-20mA / 4-20mA [Ri=50Ω]

Voltage signal input (required value 2)
0-10 VDC *DIG 4

Voltage signal input (required value 1)

0-10 VDC

Low water

Configurable digital input 1 DIG 1

External ON/OFF (release)

Actual-value-voltage input sensor 1 *DIG 2

Actual-value-voltage input sensor 2 *DIG 3

Actual-value-current input sensor 2

Sensor supply ** max. 100 mA

Actual value current input sensor 1

Ground

PAGE 2

Commercial Water

Section A (continued)

Troubleshooting the Control Card (using a Multimeter).

Power Supply disconnected!!!

Note

When the HYDROVAR is connected to power supply, the components of
the power unit as well as certain Components of the Control Card remain

under voltage.
Touching these components seriously endangers life!
All work, carried out at opened HYDROVAR, must be performed by qualified and

authorized technicians.

The following tests have to be made without connected cables.

Xylem Inc.

1) Sensor Power Supply:

X3/1 (GND) – X3/3 => 24 VDC
X3/1 (GND) – X3/24 => 24 VDC

2) Internal Ref. for Analog Output:

X3/1 (GND) – X3/19 => 10 VDC

3) Digital Inputs:

External On/Off X3/ 7 – X3/8 (GND) => 5 VDC
Conf. Digital Input 1 X3/ 9 – X3/10 (GND) => 5 VDC
Low Water X3/ 11 – X3/12 (GND) => 5 VDC

PAGE 3