Problem Description 1: The switch cannot automatically switch

Troubleshooting:

① Is the switch shorted to automatic terminals 21 and 22.

② Check whether the switch automatically and manually presses the lock to lift it.

③ Is the three-level switch connected to the neutral line.

④ Whether the on-site power supply is normal.

Solution:

① Connect terminals 21 and 22 on the left side of the switch with a 0.75-1.5 ㎡ wire, and the switch is in automatic mode.

② Rotate the key clockwise and press the lock to release the manual state of the switch.

③ Connect the two incoming zero lines to terminals 61 and 62 on the left side of the three-level switch.

④ Check the panel power fault indicator light. When the panel indicator light is red, it indicates that the power is in a fault state, and when it is green, it indicates a normal state. When the indicator light is red, a multimeter should be used to measure the on-site incoming voltage. The R-type switch checks whether the incoming voltage (A, B, C and N) is out of phase, the S-type and G-type switches check whether the incoming voltage is out of phase, and whether there is overvoltage or undervoltage (A, B, C and N). The overvoltage value is 220 × (1+20%), undervoltage value 220 × (1-17%) Factory default value.

Problem Description 2: The distribution box cabinet door is commonly closed, but the backup closing indicator light does not display

Troubleshooting:

① Is the left terminal (common I) 52 or (backup II) 54 conductive to the common terminal 51 when the switch is closed in the common or backup power position.

② Is the wiring of the on-site indicator light correct.

③ Whether the indicator is normal.

Solution:

① When the switch is in the common power position, use a multimeter to measure the continuity of terminals 51 and 52 on the left side. When the switch is in the standby power position, measure the continuity of terminals 51 and 54 on the left side.

② The L-line should be connected to terminal 51 on the left, with one end of the commonly used indicator light connected to terminal 52 and one end of the backup indicator light connected to terminal 54. Then, the other end of these two indicator lights should be connected to the N-line.

③ Remove the cabinet door indicator lamp and connect it to the power supply voltage of the lamp to check whether the indicator lamp itself is normal.

Problem Description Three: The oil engine cannot start (the backup power supply is the oil engine)

Troubleshooting:

① Is the oil engine on/off signal activated

② Is the oil engine equipment turned on

Solution:

① Measure the signal terminals of the 41 and 42 oil engines using a multimeter's beep range. When the I circuit power is cut off, terminals 41 and 42 should have a closed signal output.

② The user shall check whether the diesel engine used is normal or whether it is in automatic state.

The investigation of the above issues should be conducted by electricians with professional knowledge or qualifications. If the problem is not resolved, please contact our after-sales department for resolution.