Perma Pure eCOOL 5000 Series - Manual (Page 19)

Section J: Maintenance 19
J: M
AINTENANCE
Note: Please refer to the Spare Parts section of this manual for part numbers and
descriptions.
Daily
Verify each channel is running at 5°C (+/- 1.5°C).
LED’s should be Green.
Verify cooling fans are running.
Verify that the peristaltic pump is running and water is draining out.
Verify that the sample pump is drawing full flow.
Quarterly
Verify power supply voltage is above 14.5 VDC.
Inspect and clean the EZ-Clean Twist-Apart heat exchangers with de-ionized water.
Depending on the composition of the sample stream, heat exchangers may need to
be cleaned more often.
Inspect and replace the sample pump diaphragm when needed.
Inspect and replace the peristaltic pump tubing.
Inspect the water slip sensor and verify that there is no corrosion or restrictions to
the sensing pins.
Annually
Check and replace the Peltier cooling elements. At room temperature, a Peltier
should have a resistance of 5-10 Ohms. Higher resistance signifies the Peltier is
stressed and could fail soon.
Using a K-type thermocouple simulator, disconnect each thermocouple and simulate
a temperature between 0°C and 10°C. Verify that the readout on the display
matches the temperature to within 0.5°C. If it does not, the cooler needs to be
recalibrated. Contact Perma Pure for the calibration procedure and assistance.