Failure To Operate/Reset; Output Contacts Not Changing State; Reset Time On Mvax 12 Too Short; Spares - GE MVAX 11 Technical Manual

Service Manual
MVAX
5. PROBLEM ANALYSIS
5.1

Failure to operate/reset

Check diagram for correct input connections.
Ratings values are shown on module front plate.
Ensure the
Ensure correct series resistors are used and connected to correct relay terminals.
Flag spring may have been distorted and is holding the armature open or closed.
Check internal wiring.
Check continuity – result open circuit.
Coil open circuit.
Internal wiring damaged.
Series resistor open circuit (resistors may be internal or external).
5.2

Output contacts not changing state.

Pushrod not in position. Check output terminals with reference to diagram. Contamination of
contacts.
MVAX 21, 31, 91. Units RL
5.3

Reset time on MVAX 12 too short.

Check capacitor C
Contacts should be cleaned with the burnishing tool supplied in relay tool kits.
On no account should knives, files or abrasive materials be used.
Check mechanical settings as per Section 4.
6.

SPARES

When ordering spares, quote the full relay model number and any component references
numbers, or briefly describe the parts required.

Repairs

6.1
Should the need arise for the equipment to be returned to General Electric for repair, then
the form at the back of this manual should be completed and sent with the equipment
together with a copy of any commissioning test results.
power supply is capable
2 , RL 3 contacts not closing.
1
is not open circuit or short circuit.
Check the correct voltages are applied.
of supplying the necessary
R8010RB
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power.