Table 5-2. Troubleshooting Guidelines - MSA Chillgard RT Instruction Manual

Troubleshooting Guidelines

Table 5-2. Troubleshooting Guidelines

TROUBLE DESCRIPTION
Unit will not turn ON No power
Beacon will not light Beacon
alarm
Under-range failed Zero limit is
minus 10 ppm
Calibration failed Coefficients
out of range
(see TABLE 5-2)
SOLUTION
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 wires on terminal barrier input.
5. Check wiring to the unit power supply.
Remove power 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 VDC 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.
The voltage should be 5 VDC. Adjust Volt 1 pot
on power supply if necessary.
1. Check that plug is connected
to circuit board J10.
2. Verify audio option is used in the setup screens.
3. Replace beacon assembly.
1. Adjust display zero to 0.0 via the keypad
with zero air or zero scrubber applied.
2. Check zero air cylinder; replace if necessary.
3. Check the zero scrubber; replace if necessary.
1. Replace zero scrubber or change zero air supply.
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.
5-3