Steris VHP X10, Operator'S Manual

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4-3
Troubleshooting Operator Manual 10087252
9. Cabinet Temp RTD
Fail Occurs at any time, the Airflow
RTD (RTD2) temperature reading
indicates a break or short in the
wiring or the reading is at an
extreme high or low, for
10 seconds continuously • Sensor failure or wiring disconnected/
shorted: Check RTD2 connector and
connector on control board. Repair as
needed or replace RTD.
• Control Board failure: Replace control
board.
10. Cabinet Too Long
Heat Occurs during the heating
(cabinet) phase (prior to Condition
or Biodecontamination), and after
15 minutes of operation, the
Cabinet Temperature does not
increase 0.1°C over a 5 minute
period • Improper cabinet heater temperature
setpoint: Verify temperature setpoint.
Setpoint should be approximately 31°C.
• RTD2/Control Board/Wiring failure: Verify
proper operation of cabinet heater control
circuit.
• RTD2 failure: Calibrate or replace.
• Solid State relay (SSR2) failure: Replace.
11. RH Sensor Failure Occurs at any time, the airflow RH
(RH1) reading indicates a break or
short in the wiring for 10 seconds
continuously • Sensor failure or wiring disconnected/
shorted: Check the RH1 connector and
connector on the control board. Repair as
needed or replace RH probe or board.
• Control Board failure: Replace control
board.
12. Dehumidify Timeout Occurs during the dehumidify
phase, the RH sensor fails to reach
the setpoint within 80 minutes • Desiccant is saturated: Replace desiccant.
• Blower failure: Verify movement of air. See
Alarm Message 14 .
• RH Sensor/Control Board/Wiring failure:
Verify proper operation of RH control circuit.
• RH Sensor failure: Calibrate or replace.
• Enclosure too large for dryer type: Increase
dryer capacity.
13. Blower Airflow Dev Occurs during any cycle phase,
the cycle flow blower (MTR-1)
control output has exceeded its
upper or lower limit for two minutes
continuously • Air inlet blocked: Verify proper air flow
through X10 unit.
• MTR-1/Control Board/wiring failure: Verify
proper operation of blower control circuit.
• Solid State Relay (SSR1) failure: Replace.
14. Circ Blower Failure Occurs during any cycle phase
where the circulation blower option
is ON and the blower does not run • MTR-1/Control Board/wiring failure: Verify
proper operation of blower control circuit.
• Solid State Relay (SSR1) failure: Replace.
15. Operator Abort Occurs at any time, when the
Operator requests an abort during
a cycle • Operator initiated: Not applicable
Table 4-3. Troubleshooting Guide (Cont’d)
Alarm Message
Display
Description
Possible Causes and / or
Corrections