GEM 550 User Manual

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14 Troubleshooting
14 Troubleshooting
Error Error cause Troubleshooting
Control medium escaping from vent hole*
in the actuator cover for control func-
tionNO/ connector 2* for control func-
tion NC
Control piston leaking Replace the actuator and check control
medium for impurities
Control medium escaping from leak de-
tection hole
Spindle seal leaking Replace the actuator and check control
medium for impurities
Working medium escaping from leak de-
tection hole
Gland packing faulty Replace the actuator
The product does not open or does not
open fully
Control pressure too low (for control
function NC)
Operate the product with the control pres-
sure specified in the datasheet
Control medium not connected Connect control medium
Control piston or spindle seal leaking Replace actuator and check control me-
dium for impurities
Actuator spring faulty (for control func-
tion NO)
Replace the actuator
The product is leaking downstream (does
not close or does not close fully)
Operating pressure too high Operate the product with operating pres-
sure specified in datasheet
Foreign matter between seat seal and
seat
Remove actuator, remove foreign matter,
check seat seal for damage and replace
seat seal if necessary
Valve body leaks or is damaged Check valve body for damage, replace
valve if necessary
Seat seal faulty Check seat seal for damage and replace
seat seal if necessary
Actuator spring faulty (for control func-
tion NC)
Replace actuator
The product is leaking between actuator
and valve body
Union nut loose Retighten union nut
Sealing washer faulty Check sealing washer and the respective
sealing surfaces for damage and replace
parts if necessary
Actuator/valve body damaged Replace the actuator/valve body
Connection between valve body and pip-
ing leaking
Incorrect installation Check installation of valve body in piping
Threaded connections / unions loose Tighten threaded connections / unions
Sealing material faulty Replace sealing material
Valve body leaking Valve body leaking or corroded Check valve body for damage, replace
valve body if necessary
* see chapter "Spare parts"

GEM 550 Specifications

General

Brand	GEM
Model	550
Category	Control Unit
Language	English