MSR ELECTRONIC PolyGard 2 - Troubleshooting; Indicators at the SC2; Indicators at the MC2; Sensor Board (PCB)

User Manual - PolyGard
®
2 / µGard
®
2
Sensors for Toxic Gases
Page 9
PolyGard

/ µGard
®
are registered trademarks of MSR Made in Germany GA_SC2_MC2_Tox_D_0820
Phone +49 8531 9004-0 Fax: +49 8531 9004-54 Specification subject to change without notice
MSR-Electronic GmbH, Buergermeister-Schoenbauer-Str. 13, D 94060 Pocking www.msr-electronic.de
7 Troubleshooting
7.1 Indicators at the SC2
The SC2 has got no diagnostic indications; they are only available on the PCB of SB2, MSC2, MSB2 or WSB2.
7.2 Indicators at the MC2
The 4–20 mA output of the MC2 can be used as diagnostic indicators.
Output current
Restart: 1 mA
Device error: 2 mA
Tolerable negative sensor drift: 3–4 mA
Normal measurement mode: 4–20 mA
Tolerable overrange: 20–21 mA
Overrange error: > 21 mA
Maintenance message: 19 mA
7.3 Sensor Board (PCB)
Trouble
Cause
Solution
Green LED isn’t on.
Power voltage not applied.
Measure tension at X4:
(16–28 V DC) Pin 1 (+) and 2 (-)
Polarity not correct at X4.
Connect correctly.
Connector X4 not plugged in.
Check the plug.
Wire breakage
Check the wiring.
Green LED doesn’t flash.
PCB: no address
Check PCB address, address
correctly.
PCB: no field bus communication
Check field bus wiring,
topology and termination.
No measured value at the Tool
or Controller
SC not or wrongly plugged in.
Check SC plug.
SC not registered.
Register SC.
SC gas type/measuring range doesn’t
match with registered ones.
Check SC data<> registration
data for conformity.
Message at the Tool / Controller:
- 24 V DC voltage <range>
- 5 V DC voltage <range>
- Temp. <range>
- WatchDog triggered
Internal error
Replace PCB.
7.4 Sensor Cartridge (Messages at the Tool / Controller)
Measuring signal <range>
Internal error
Replace SC.
5 V DC voltage < range >
Temp. < range >
WatchDog triggered
SC Input 1  stored type
Wrong SC type at input 1
Check SC at input 1, replace it.
SC Input 2  stored type
Wrong SC type at input 2
Check SC at input 2, replace it.
SC Input 3  stored type
Wrong SC type at input 3
Check SC at input 3, replace it.