Arena Service Manual
Pressing the dialyze bypass switch will restart the dialysate flow
through the dialyzer circuit lines.
WARNING
To prevent being burned, do not open the fluid path
during the Heat Clean cycle.
At the end of the recirculation period, the Instrument automatically
goes into either soft power off or cool down, depending on
whether “Heat Clean Auto Off” or “Cool Down” was selected by
the operator.
To start a heat disinfection cycle:
1. Confirm the Instrument is in the Rinse Mode.
2. Touch RINSE MENU.
3. Touch HEAT CLEAN MENU.
4. Select either Heat Clean or Heat Clean Auto Off.
5. Touch VERIFY.
The message “!Warning! Heat Clean in Process” will be displayed
and the Heat Clean Cycle will be initiated. Make sure the dialyzer
and concentrate lines become hot to the touch.
The date of the last completed heat clean and the last completed
automated chemical disinfection is displayed in the disinfect data
report when the RINSE MENUS button is touched. An error
message for a failed disinfect cycle is displayed in the Heat Clean
Data Report upon power on following the cycle.
The fluid path temperature is monitored during the recirculation
period. The message “Unstable Heat Clean Temp!” flashes in the
instruction window if the fluid path temperature drops below 85°C
but remains above 80°C for a limited time during the heat clean
recirculation period. The message “Disinfection Not Complete!”
flashes in the instruction window if the temperature drops below
80°C or if the temperature remains between 80 and 85°C longer
than approximately 10 minutes during the heat clean recirculation
period.
9.3.2 Automatic Cool Down
When the heat clean time is complete, the Instrument enters the
Cool Down Mode unless Auto Off was selected. The Cool Down
Mode “dialysate” flow rate is set at 800 mL/min or the Instrument-
calibrated maximum flow rate (if lower) until the primary high
temperature alarm has ceased. When the primary temperature is
out of alarm, the Instrument will revert back to the Rinse Mode.
9-8 157-1278-916, Rev A
March 2004
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