Overview of Maintenance

The following pages describe maintenance procedures (simple repairs) that can be done without opening the main cover.

**Table:** Maintenance Procedures
Procedure	Typical Frequency	Notes
Cleaning the Module	If required
Replacing Parts of the Valve Head	If the valve performance shows indication of leakage or wear
Replacing the Fuses of the Valve Drive	When a fuse is defect
Replace Valve Heads of the G1170A Valve Drive	If the valve performance shows indication of leakage or wear
Replace the Module Firmware	If required