12 MAINTENANCE AND TROUBLESHOOTING 83
12.4.3 E-4 Improper test pressure
When arranging a pressure switch to WORK-side measurement system and not using the original one, E-4
error message might be appeared. In that case, the wrong setting of the test pressure or malfunction of the
air-operated valve could be its cause.
12.4.4 E-5: Air-operated Valve Inactive
When the error E-5 is indicated, check the followings (See Section 4.4 → )
1) Test pressure
A positive pressure of 8 kPa or more or a negative pressure of -13 kPa or more is required.
2) Pilot pressure
A pilot pressure should be regulated 400 to 700 kPa.
3) DL3 timer
A Low test pressure model will require longer DL3 timer than usual. Extend the DL3 timer by 1 to 2
seconds. In case of Micro-low pressure model may require optional orifice.
4) Air-operated valves and solenoid valves
If contaminants are found in the air-operated valves, cleaning or replacement is required.
5) DPS sensitivity
Check the DPS sensitivity using a Leak Master, and DPS span.
12.4.5 E-9 Pressurization valve error
In case WORK & MASTER volume are largely different or exhaust time takes longer, the offset of the
differential pressure sensor could exceed its limit and display E-9 error message. In those cases, please
arrange the time for more than 5 sec by memory switch.
(Refer to 10.2.3 → )
When arranging a pressure switch to WORK-side measurement
system, the effect of the volumetric change of pressure switch
could cause the reduced sensitivity and leak.
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