43
Pro Dry Instruction Manual
|
Walker Filtration
|
www.walkerfiltration.com
Section 8:
Troubleshooting
Troubleshooting
General troubleshooting
Before specific identification of any fault is looked for, the following general points must be verified:
•
Has the unit been damaged externally or are any parts missing?
•
Is power being supplied to the unit?
•
Was start-up carried out in accordance with the instructions in this manual?
•
Are all external valves correctly set for operation?
• Do the operational conditions meet those specified at time of ordering and used for product selection?
Troubleshooting: General
Problem
Possible Cause
Action
Poor dewpoint
Liquid water at dryer inlet
Check pre-filtration and drains
Excessive flow
Check actual flow against maximum
specified
Low inlet pressure
Check against specification
High inlet temperature
Check against specification
Silencer blocked or damaged
Replace silencer
Air leaks
Tighten joints or fit new seals
Desiccant life exceeded
Replace desiccant cartridges
Desiccant contaminated
Check inlet filter and drains,
replace cartridges
EM is active when air is flowing
through dryer
Check EM wiring, logic and/or control
method used
Power to dryer off while air is flowing
through dryer
Ensure that power is on whenever air is
flowing through dryer
Incorrect dryer operation
Jammed shuttle valves or faulted electrical
components
See electrical operation troubleshooting
section
Excessive or loud purge, or purge on
only one tower
Jammed Main Shuttle Valve
Clean or replace shuttles
Jammed Purge Exhaust Shuttle (PD2)
Clean or replace exhaust shuttles
Faulty Solenoid Valve
Clean or replace solenoid valve
Not utilizing Energy Management feature
Refer to Energy Management instructions
(Section 8)
