Waters HPLC - Page 108

3-24 Troubleshooting, Testing, and Maintenance
Fluid system troubleshooting
The table below addresses potential pump unit symptoms that can arise
during operation.
No response from
keypad
Keypad is locked Unlock keypad on
PUMP SETUP screen.
Keypad is broken Check keypad.
CPU in Hold mode Call Waters Technical
Service.
Pump troubleshooting
Symptom Possible cause Corrective action
Pump will not run Loose control cable Reattach cable to rear
of fluid handling unit.
High pressure limit set
to 0
Set higher pressure
limit on PUMP SETUP
screen.
Broken plunger
jamming the pump
Replace damaged
plunger.
Defective pump motor Call Waters Technical
Service.
Defective circuit board Call Waters Technical
Service.
Defective pump
transducer
Replace pump pressure
transducer.
General system troubleshooting (Continued)
Symptom Possible cause Corrective action