Troubleshooting Electrical controllers
SC Series
SB Series 、ED Series
150 Series
50 Series
SC Series
1 | LED display does not light up. |
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Inspection items 1 | Wiring of A1 and A2 | Inspection result | Not wired correctly | Solution | Wire correctly |
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Inspection items 2 | Is the voltage of A1 and A2 between 100 and 240V? | Inspection result | Different between 100-240V | Solution | Set between 100 and 240V |
2 | No output even if the overcurrent setting is set to the MIN value. |
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Inspection items 1 | Wiring to current transformer (CT) | Inspection result | Not wired correctly | Solution | Wire correctly |
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Inspection items 2 | Shock Relay model number | Inspection result | Wrong model number | Solution | Replace with correct one |
Inspection items 3 | TEST function | Inspection result | Output relay does not operate | Solution | Replace Shock Relay |
3 | Output relay operates immediately after start-up. |
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Inspection items 1 | Start time setting | Inspection result | Setting is too short | Solution | Adjust to proper value |
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Inspection items 2 | Load current setting | Inspection result | Setting is too low | Solution | Adjust to proper value |
Inspection items 3 | Parameter setting | Inspection result | Phase reversal, open phase and phase unbalance are set to ON | Solution | Check for wiring that is phase reversal or open phase |
4 | Momentary overload during operation activates the output relay. |
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Inspection items 1 | Load current setting | Inspection result | Setting is too low | Solution | Adjust to proper value |
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Inspection items 2 | Shock time setting | Inspection result | Setting is too short | Solution | Adjust to proper value |
5 | Output relay does not operate when overloaded. |
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Inspection items 1 | Load current setting | Inspection result | Setting is too high | Solution | Adjust to proper value |
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Inspection items 2 | Shock time setting | Inspection result | Setting is too long | Solution | Adjust to proper value |
Inspection items 3 | TEST function | Inspection result | Output relay does not operate | Solution | Replace Shock Relay |
SB Series 、ED Series
6 | MON (monitor lamp) does not light up. ---SB Series LED display does not light up. ---ED Series |
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Inspection items 1 | Wiring of A1 and A2 | Inspection result | Not wired correctly | Solution | Wire correctly |
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Inspection items 2 | Is the voltage of A1 and A2 between 24 and 240VAC/DC? | Inspection result | Different between 24-240V | Solution | Set between 24 and 240V |
7 | No output even if the current setting volume is minimized. |
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Inspection items 1 | Wiring to current transformer (CT) | Inspection result | Not wired correctly. | Solution | Wire correctly |
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Inspection items 2 | Shock Relay model number | Inspection result | Wrong model number | Solution | Replace with correct one |
Inspection items 3 | Press TEST button | Inspection result | Output relay does not operate | Solution | Replace Shock Relay |
8 | Output relay operates immediately after start-up. |
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Inspection items 1 | Start time setting | Inspection result | Setting is too short | Solution | Adjust to proper value |
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Inspection items 2 | Load current setting | Inspection result | Setting is too low | Solution | Adjust to proper value |
9 | Momentary overload during operation activates the output relay. |
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Inspection items 1 | Load current setting | Inspection result | Setting is too low | Solution | Adjust to proper value |
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Inspection items 2 | Shock time setting | Inspection result | Setting is too short | Solution | Adjust to proper value |
10 | Output relay does not operate when overloaded. |
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Inspection items 1 | Load current setting | Inspection result | Setting is too high | Solution | Adjust to proper value |
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Inspection items 2 | Shock time setting | Inspection result | Setting is too long | Solution | Adjust to proper value |
Inspection items 3 | Press TEST button | Inspection result | Output relay does not operate | Solution | Replace Shock Relay |
150 Series
11 | Power indicator does not light up. |
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Inspection items 1 | Wiring of POWER terminal | Inspection result | Not wired correctly | Solution | Wire correctly |
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Inspection items 2 | Voltage at POWER terminal (between terminals 100/110 V) For the above operating power supply |
Inspection result | Different from AC100/110V | Solution | Set to AC100/110V |
Inspection items 3 | Voltage at POWER terminal (between terminals 200/220 V) For the above operating power supply |
Inspection result | Different from AC200/220V | Solution | Set to AC200/220V |
12 | % Display meter does not move during operation. |
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Inspection items 1 | Wiring of current transformer | Inspection result | Not wired correctly | Solution | Wire correctly |
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Inspection items 2 | Current transformer model number | Inspection result | Wrong model number | Solution | Replace with correct one |
Inspection items 3 | Press TEST button | Inspection result | % Display meter does not move | Solution | Replace Shock Relay |
13 | Output relay operates immediately after start-up. |
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Inspection items 1 | Start time setting | Inspection result | Setting is too short | Solution | Adjust to proper value |
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Inspection items 2 | Current setting | Inspection result | Setting is too low | Solution | Adjust to proper value |
14 | Motor starts but % display meter reading is different for actual current. |
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Inspection items 1 | Common current transformer | Inspection result | Not wired correctly to terminals | Solution | Wire correctly |
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Inspection items 2 | Through-type current transformer | Inspection result | Wrong number of passing through | Solution | Make correct number of passing through |
Inspection items 3 | Current transformer model number | Inspection result | Wrong model number | Solution | Replace with correct one |
15 | Momentary overload during operation activates the output relay. |
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Inspection items 1 | Load current setting | Inspection result | Setting is too low | Solution | Adjust to proper value |
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Inspection items 2 | Shock time setting | Inspection result | Setting is too short | Solution | Adjust to proper value |
16 | Output relay does not operate when overloaded. |
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Inspection items 1 | Load current setting | Inspection result | Setting is too high | Solution | Adjust to proper value |
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Inspection items 2 | Shock time setting | Inspection result | Setting is too long | Solution | Adjust to proper value |
Inspection items 3 | Press TEST button | Inspection result | Output relay does not operate | Solution | Replace Shock Relay |
50 Series
17 | Input indicator does not light up after motor start-up. |
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Inspection items 1 | Wiring of POWER terminal | Inspection result | Not wired correctly | Solution | Wire correctly |
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Inspection items 2 | Voltage at POWER terminal (between terminals 100/110 V) For the above operating power supply |
Inspection result | Different from AC100/110V | Solution | Set to AC100/110V |
Inspection items 3 | Voltage at POWER terminal (between terminals 200/220 V) For the above operating power supply |
Inspection result | Different from AC200/220V | Solution | Set to AC200/220V |
18 | Output relay operates immediately after start-up. |
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Inspection items 1 | Load current setting | Inspection result | Setting is too low | Solution | Adjust to proper value |
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19 | Momentary overload during operation activates the output relay. |
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Inspection items 1 | Load current setting | Inspection result | Setting is too low | Solution | Adjust to proper value |
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Inspection items 2 | Shock time setting | Inspection result | Setting is too short | Solution | Adjust to proper value |
20 | Output relay does not operate when overloaded. |
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Inspection items 1 | Load current setting | Inspection result | Setting is too high | Solution | Adjust to proper value |
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Inspection items 2 | Shock time setting | Inspection result | Setting is too long | Solution | Adjust to proper value |
Inspection items 3 | Current transformer model number | Inspection result | Wrong model number | Solution | Replace with correct one |
※If the results of the above inspection show that there are no problems, or if Shock Relay needs to be replaced according to the solution, please contact us.