Security Escort | Installation and Setup Guide |5.0 Testing

and Troubleshootin

EN | 45

Bosch Security Systems | 1/09 | 33831E

Table 12: EA500 Transponder Bus Faults

Symptoms Probable Cause Possible Solution

Bus failure.

1. Bus power

jumper not in

place.

2. Short or open

on the bus

wires.

3. No power to

receiver.

4. Close lightning

hit.

5. Bad bus on

transponder.

1. Place jumper on for corresponding bus (see the

transponder’s Installation Instructions for location

of jumper).

2. Put meter across bus wire. Should be reading between

7.5 VDC to 10.5 VDC. If voltage is not present or

lower than 9 V, check wiring (BUS+ to BUS-) for

possible ground, short, or open.

3. Check power for 10.5 VDC to 13.5 VDC. If lower than

10 VDC or no voltage present, check wiring (PWR+ to

PWR-) on power side of receiver, repair, or replace

cable.

4. Power down transponder (AC and battery) for 30-sec.,

then turn power back on. If bus failure does not

clear, go to Step 5.

5. Remove cable from bus, meter terminals with VOM. If

voltage is lower then 9 VDC on BUS+ or lower then 12

VDC on PWR+, replace transponder.

Table 13: EA102 Receiver Issues

Symptoms Probable Cause Possible Solution

Single

receiver not

responding.

1. Address switch in wrong

position

2. Open on the bus wires

3. No power to receiver

4. Defective receiver

1. Rotate switch to correspond with transponder

database location.

2. Put meter across bus wire. Should be reading

between 7.5 VDC to 10.5 VDC. If voltage is not

present or lower than 9 V, check wiring (BUS+

to BUS-) for possible ground or open.

3. Check power for 10.5 VDC to 13.5 VDC. If lower

than 10 V or no voltage present, check wiring

(PWR+ to PWR-) on power side of receiver repair

or replace cable.

4. If power is present on BUS+ and PWR+ and rotary

switch is set to correct address, replace

receiver.

Single

receiver

intermittentl

y not

responding

1. Receiver is located past

the

900 m (3000 ft.) maximum

cable run.

2. Moisture on circuit

board.

3. Cable going to ground

occasionally.

4. Insects nesting on

circuit board.

5. Bad splice to receiver.

6. Defective receiver.

1. Re-engineer location or reroute cable to be

under 900 m (3000 ft.).

2. Seal housing where moisture is entering

enclosure. Replace receiver until the old one

dries out.

3. Replace or repair cable.

4. Seal any entry point and spray insect repellent

inside housing to stop any further invasions

into receiver.

5. Check all splices to make sure cables are tight

and not loose causing high resistant open.

6. If power is present on BUS+ and PWR+, between

7.5 VDC and 10.5 VDC on bus, and 10.5 VDC and

13.5 VDC on power, replace receiver.

Single

receiver

reporting bad

check sum.

1. Two receivers on the bus

with the same address ID

number.

2. Moisture or water on

receiver.

3. Length of cable to

receiver. Receiver is

1. Check rotary switches on all receivers on that

bus to be sure there are no duplicate ID

numbers.

2. Replace receiver with new one until the old

receiver dries out. Seal any point where

moisture is entering the receiver housing.

3. Reconfigure the bus run to make sure receiver

is within 900 m (3000 ft.) of the transponder.

1 2 ... 40 41 42 43 44 45 46 47 48 49 50 ... 53 54

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