Troubleshooting - Ametek 270SF Instruction Manual

Troubleshooting

The following table should give an overview of possible errors and an instruction to check and to repair them (is not valid
for the starting-up period of cooler).
Error
No sample gas flow
Low temperature alarm
High oxygen readings/ low pollutant
readings
Low readings during calibration
Possible reason
Filter element plugged
Filter chamber exit port plugged
Insufficient warm-up time
Power disconnected
Control switch defective
Leak
Insufficient calibration gas flow
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Check/Repair
Check/ replace filter element
Remove filter element and inspect exit
port. Exit port will be located at 0° or 180°
depending on configuration
Ensure power has been applied to the unit
for a minimum of 15 minutes
Ensure power is supplied to the unit.
Check by measuring for AC voltage on
TB1-1 & 2
Verify by measuring for a closed circuit
between TB1-1 & 4
Leaking past the filter element O-Rings.
Remove filter element and inspect
O-Rings. There are two O-Rings, one
located at the base of the filter element
and the other in the cap. Ensure both
are pliable and seated in their respective
grooves
Leaking blowback solenoid valve.
Block or disconnect the blowback supply
Loose connection
Verify all fittings are leak free
Ensure calibration flow is at least 110% of
the sample gas flow
MAN.270SF.REVA.12222014