Chapter 14 Fault CodesMH300
ID No.
Display Fault Name Description
61
Y-connection /
Δ-connection
switch fault
(ydc)
A fault occurs when Y-Δ switches
Action and Reset
Action condition
1. ydc occurs when the confirmation signals of Y-connection and Δ-
connection are conducted at the same time.
2. If any of confirmation signals is not conducted within Pr. 05-25, ydc
occurs.
Action time Pr. 05-25
Fault treatment parameter N/A
Reset method Manual reset
Reset condition
Can be reset only when the confirmation signal of Y-connection is
conducted if it is Y-connection, or when the confirmation signal of Δ-
connection is conducted if it is Δ-connection.
Record Yes
Cause Corrective Actions
The electromagnetic valve
operates incorrectly during Y-Δ
switch.
Check if the electromagnetic valve works normally.
If not, replace it.
Incorrect parameter setting Check if related parameters are all set up and set correctly.
The wiring of Y-Δ switch
function is incorrect
Check the wiring.
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