YEQ2C type switch connect with W2/W3 controller 
YEQ2Y switch connect with W2/W3 controller YEQ3-W type switch connect with W2/W3 controller B Type/ Y type/ W2 type/ W3 type controller instruction □ Display in the normal condition :a,b,c will be the A,B,C 3 phase voltage and frequency of the normal power. a.,b.,c.,f.will be the A,B,C 3 phase voltage and frequency of the standby power.When the closing light is flashing,it means the switch is in delay and ready to transfer.
□ Display of the transfer falt condition:
Indicate "nEtt":means the motor fault overtime when transfer to the main power
Indicate "tEtt":means the motor fault overtime when transfer to the standby power
Indicate "-Ett":means the motor fault overtime when in double point
Parameters code, scope and the default value
□ Set the operation process ■
Parameter modification operation process Entering method：press the button MANUAL/AUTO 10 times continuously to enter the parameter modification menu，the forth display code flashing.
Modify parameter :press the "Main" button turn down or press the button "Standby "turn up code,press "double point"button to Confirm to enter the modify parameters,last three digits flashing,then press"Main"or "Standby "button to increase or minus the digits,then press the "double point"to preserve the parameter to enter the next options. Exit:not press any button for 10 second it will quit automatically or press the "double point"for times it will quit.When modify the parameter, quit without pressing the preserve button then it will quit directly not preserve the parameter modified.
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Voltage calibration process Entering method：Press the "Standby "button 10 times to enter it in the mode of Automatic,the fourth digits indicate "three" and flashing.
calibrate the voltage:Before calibrate the voltage,we must adjust the three way voltage of the main power and standby power to AC220V,then press button "double point" to preserve the current calibration value.
Exit:not press any button for 10 second it will quit automatically or press the button "standby" for times it will quit.
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Transfer record query Entering method：Press the "Standby "and "main "button at the same time to enter the latest transfer record in the mode of Automatic.
E-01:The latest first transfer record.
E-02:The latest second transfer record.
E-03:The latest third transfer record.
press the button"double point" to enter the query the reason of transfer.
u-00:Means no transfer record.
u-01:Means transfer reason of Main power A phase fault.
u-02:Means transfer reason of Main power B phase fault.
u-03:Means transfer reason of Main power C phase fault.
(Note:it will not record the transfer not because of the fault,the fault record means loss phase,undervoltage,overvoltage,loss voltage fault,the Main power A,B,C,N without power at same time it will also not record )
Exit:not press any button for 10 second it will quit automatically.
