PRESENCE

Row 1 (spots 1 through 6), are on during open door position and off during closed door position.

SENSOR DEPTH

PATTERNS -

 

Cont.

 

 

 

(4) Deep Without Row 1

(5) Middle Without Row 1

(6) Limited Without Row 1

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

1

2

3

4

5

6

 

 

 

 

 

 

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

TROUBLE- SHOOTING

PROBLEM

PROBABLE CAUSE

CORRECTIVE ACTION

 

 

 

Presence Sensor will not

1. Improper input voltage

1. Check terminals 1 & 2 for proper voltage

set-up upon initial powering

2. Presence Sensor is in detection

24 V AC/DC + 10%.

 

3. Potential interferences from high

2. Make certain that the field of detection is all

 

intensity lighting

clear during the set-up and that all lenses

 

 

are installed on the Presence Sensor. If

 

 

detection is encountered upon initial set-up,

 

 

the Presence Sensor will continuously flash

 

 

Green at + 2 Hz. The Presence Sensor will

 

 

also not set-up if permanent stationary

 

 

objects are extremely close to the sensor.

 

 

Ensure that, not only is the detection field all

 

 

clear, but that the sensor is mounted

 

 

properly (using the Presence Sensor

 

 

mounting block if necessary).

 

 

3. Ensure that no high intensity lighting is in

 

 

the immediate area of the sensor.

Door will not open once set-

1. Presence Sensor is in detection.

1. Ensure that there is no detection occurring

up has been completed.

2. Improper wiring

at the Presence Sensor. If the Red LED is

 

3. Lockout safety beams are in

on steady, there is detection. Make sure

 

detection

there have been no changes in the field of

 

4. Improper relay output configuration

detection since set-up. If permanent

 

 

changes have occurred, launch a new set-

 

 

up and re-test door.

 

 

2. Remove the output wires (common,

 

 

normally open, normally closed) from the

 

 

Presence Sensor. CAUTION – there may

 

 

possibly be no safety on the door when

 

 

this test is performed. Activate the door

 

 

control, if the door opens, the fault exists

 

 

with Presence Sensor or related wiring. If

 

 

door does not open, the faults may exist

 

 

with the door control or it’s related wiring.

 

 

3. Ensure proper relay output setting. Refer to

 

 

page 6. Typically, relay setting should be

 

 

“Normally Open”. This means the relay

 

 

would close upon detection.

75.5255.02 XXXXXXXX

 

7940-8770 LCN

Page 10 of 11

Page 10 Page 12
Page 11
Image 11
Ingersoll-Rand 7940-8770 TROUBLE- Shooting Problem Probable Cause Corrective Action, Presence Sensor. Caution there may
Page 10 Page 12

7940-8770 specifications

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