32
REVO S
2PH from 60A to 210A
User’s manual
Trouble shooting
Small problems sometimes can be solved locally with the help of the below tab of trouble shooting.
If you don’t succeed, contact us or your nearest distributor.
Symptom
Indication on
front unit
Possible reasons
of the symptom
Actions
Load current
doesn’t flow
Green LED (ON)
light OFF ( )
• No Auxiliary Voltage
• No input signal
• Reversed polarities of
input signal
• Give auxiliary voltage
supply
(See Connection Diagram)
• Provide to give input
signal
• Reverse the input signal
polarity
Green LED (ON)
light ON ( )
• Fuse failure
• Load connection
interruption
• Load failure: The yellow
led (HB) is light on (with
HB option)
• Thyristor fault: The red led
(SC) is light on (with HB
option)
• Change the fuse
• Check the wiring
• Check the load
• Change the thyristor
module
Load current flow also
without input signal
Red LED (SC)
light ON ( )
• Wrong wiring
• SCR short circuit
• Check the wiring
• Change the thyristor
module
Current flows at nominal
value but Yellow LED
(HB/SC) is light on
Yellow LED (HB)
light ON ( )
or
Red LED (SC)
light ON ( )
• HB circuit not tuned
• Current transformers not
properly wired
• Make HB calibration
procedure
• Check current
transformers wiring
Thyristor unit doesn’t
work properly
• Auxiliary voltage supply
out of limits
• Wrong input signal
selection
• Wrong input signal
calibration (out of range)
• Verify the auxiliary voltage
supply
• Control input signal
setting
• Check input setting
11
Summary of Contents for S2PH
Page 2: ......