Waters 717plus - Chapter 5 Maintenance; 5.1 Defrosting the Heater;Cooler

Defrosting the Heater/Cooler 127
5
Chapter 5
Maintenance
This chapter covers 717plus Autosampler maintenance. Procedures are provided for
defrosting the heater/cooler and for replacing the syringe, seal pak, and in-line filters.
5.1 Defrosting the Heater/Cooler
When to Defrost
If the heater/cooler fails to reach the lowest setpoint at recommended ambient conditions
(16 to 27° C and 80 percent relative humidity), defrost the heater/cooler compartment.
Note: Maintain proper ventilation space (see Section 2.1,
Site Requirements).
Defrosting the Heater/Cooler
To defrost:
1. Press the keys outlined in Figure 5-1
.
2. Open the sample compartment door. The defrost cycle takes 60 minutes.
Note: If you want to stop the defrost cycle before the programmed time expires, press
Stop Defrost.