Steris SYSTEM 1E, Maintenance Manual

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5-9
764333-675
5.2 DIAGNOSTIC CYCLE FAULTS
5.2.1 A/D Converter Fault
Description – Control monitors a fixed resistor for
known values.
Action:
1. Check wiring connections at power supply and
control board – repair. (Refer to Figures 5-4 and 5-7.)
2. Faulty power supply – replace.
3. Faulty control board – replace.
4. Faulty transducer – replace.
5.2.2 Inlet H2O Temp < 43°C
Description – Control monitors TC3 drain block
during the water dump phase. Temperature must be
> 43°C or alarm occurs.
Action:
1. Check that water supply is ON.
2. Facility water temperature is < 43°C – correct.
3. Faulty control board – replace.
4. Faulty TC3 – recalibrate. (Refer to Figure 5-2.)
5. Faulty SOL5 – replace. (Refer to Figure 5-5.)
6. Low air pressure – check compressor/LS5 air
piping components.
7. Faulty LS2 – replace.
5.2.3 UV Intensity Timeout
Description: SYSTEM 1E Processor senses UV
intensity signal is below 15.0 mA after 10 minutes.
Action:
1. UV system unplugged – plug into receptacle.
2. Fouled (dirty) quartz sleeve – clean.
3. UV monitor harness not connected – plug into
connector on rear of processor.
4. Faulty UV monitor – replace.
5. Faulty UV lamp – replace.
6. Ballast circuit breaker tripped – reset.
7. Faulty UV lamp ballast – replace.
5.2.4 UV Lamp Below 14.5 mA
Description - SYSTEM 1E Processor detects a UV
intensity of less than 14.5 mA.
Action:
1. Fouled (dirty) Quartz sleeve – clean.
2. UV monitor harness not connected – plug into
connector on rear panel of processor.
3. Faulty UV monitor – replace.
4. Faulty UV lamp – replace.
5. Ballast circuit breaker tripped – reset.
6. Faulty UV lamp ballast – replace.