Danfoss EV210B How To Use Manual page 31

Symptom:
Probable cause
Incorrect voltage/frequency
Coil short-circuit
(could be moisture in coil)
Armature sluggish
a) Damaged/bent armature tube
b) Damaged armature
c) Dirt in armature tube
Temperature of medium too high Check valve and coil data in relation to installation
Ambient temperature too high
© Danfoss A/S (IA-MC/mhe) 05-2007 / 520B2809
Coil burnt - cold with voltage on
Remedy
Check coil data.
If necessary, change to correct coil type.
Check wiring diagram and wiring.
Check maximum voltage variation:
Permissible voltage variation:
±10% for dual frequency; dc and NO applications
+10% / -15% for ac on single frequency voltages
Check rest of installation for possible short-circuiting.
Check lead connections at coil.
When fault has been found, replace coil. (See also "Coil"
in section "Installation"). Consider fitting a 'clip-on' style
coil with addional sealing O-ring (for high performance
range only).
Replace defective component(s).
Remove dirt.
specification.
Change to suitable coil or valve.
If possible, move valve to colder surroundings.
Check valve and coil data in relation to installation
specification.
Increase ventilation around valve and coil.
Fault location
29