MSA Chillgard RT - Table 5-2. Troubleshooting Guidelines

5-3
Troubleshooting Guidelines (see TABLE 5-2)
Table
5-2. Troubleshooting Guidelines
TROUBLE DESCRIPTION SOLUTION
Unit will not turn ON
No power
1.
Check AC power to unit.
2. Verify AC power to unit is wired properly.
3. Replace L1 and/or L2 fuse.
4.
Check for loose wi
res on terminal barrier input.
5.
Check
wiring to the unit power supply.
Remove pow
er supply cover and check fuse;
replace if
necessary.
6.
Check
input cable to main board on left side of
power supply.
7.
Check for 12 VD
C power supply output.
Connect the DVM negative lead to TP5
and the positive lead to TPSPD1. Adjust Volt 2
pot on the power supply if necessary.
8. Move the DVM positive lead to TPSPD3.
Th
e voltage should be 5 VDC. Adjust Volt 1 pot
on power supply if necessary.
Beacon will not light
Beacon
alar
m
1.
Check that plug is connected
to circuit board J10.
2. Verify audio option is used in the setup screens.
3. Replac
e beacon assembly.
Under-range failed Zero limit is 1. Adjust display zero to 0.0 via the keypad
minus 10 ppm with zero air or zero scrubber applied.
2. Check z
ero air cylinder; replace if necessary.
3. Check
the zero scrubber; replace if necessary.
Calibration failed Coefficients 1. Replace zero scrubber or change zero air supply.
out of range
2. Check span gas supply.
3. Check all tubing, filters and fittings for leaks.
4. For sequencer units, make sure unit is locked
on the selected sample port used for calibration.
5. Leak test the flow system.
6. Return
to MSA for service.