GE MN-ValVue-v2-8-IOM Manuel de service télécharger pdf (Page 158)

ValVue Digital Communications Software Ver. 2.80

158

GE Oil & Gas

LINKAGE_DRIF

T

Linkage Drift 2 1:In the fully open or fully

closed position a raw travel

sensor count deviation of

x% exists against the cali-

brated stop value.

1: Verify that linkage is well

fastened.

2: Re run the Find Stops

method. When device goes

in Failsafe when running

the Find Stop method,

clear alarm and rerun the

stops.

VALVE_

STUCK_

CLOSED

Valve Stuck

Closed

Measured fric-

tion is below

customer

specified

range.

2 1: A handwheel is left

engaged.

2: Valve is seized in place.

3: Insufficient actuator

thrust.

1: Verify presence of a

mechanical stops such as

a handwheel.

2: Repair valve.

3: Run a PST or Extended

signature. If friction is

abnormal then overhaul

valve.

VALVE_

STUCK_

OPENED

Valve Stuck

Opened

Measured fric-

tion is above

customer

specified

range.

2 1: A handwheel is left

engaged.

2: Valve is seized in place.

3: Exhaust port is clogged

up (no venting).

4: An accessory prevents

the air from the actuator to

be vented.

1: Verify presence of a

mechanical stops such as

a hand wheel.

2: Repair valve.

3: Verify that exhaust port

is not restricted.

4: Run a TBT test from Val-

Vue. A failure of the TBT

test would indicate a prob-

lem in venting.

UI_OFF UI_OFF Pressure to

move valve is

greater than

customer

specified

range.

2

RANGE3 Range 3 Supply pres-

sure drop

exceeds a cus-

tomer speci-

fied value.

2

RANGE4 Range 4 PST canceled

before com-

pletion.

2

Table 8 Fault Matrix (Continued)

FAULT Name TEXT For DD &

ValVue

HELP For DD &

ValVue

Critic

ality

Probable Cause Recommended Action

1 2 ... 153 154 155 156 157 158 159 160 161 162 163 ... 659 660

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