Sinclair SCV-1400EB, Service Manual

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Trigger/resume condition

Trigger condition: Open circuit of U-phase lower tube corresponding to compressor.

Resume condition: Check whether the IPM module is working.

Reset method: Change the module board. Power on and start up again.
Possible causes
 There IPM module is damaged.
Procedure

Check whether the IPM virtual welding and the PWM related transmission circuit of the MCU are connected to the welding.
If so, change the replace the drive board.
6.19 L6c: Open circuit of V-phase upper tube
Description

Open circuit of V-phase upper tube.

After the fault, the compressor stops running, and if the fault disappears after one minute, the compressor starts again.
Trigger/resume condition
 Trigger condition: Open circuit of V-phase upper tube corresponding to compressor.

Resume condition: Check whether the IPM module is working.

Reset method: Change the module board. Power on and start up again.
Possible causes

There IPM module is damaged.
Procedure

Check whether the IPM virtual welding and the PWM related transmission circuit of the MCU are connected to the welding.
If so, change the replace the drive board.
6.20 L6d: Open circuit of V-phase lower tube
Description

Open circuit of V-phase lower tube.

After the fault, the compressor stops running, and if the fault disappears after one minute, the compressor starts again.
Trigger/resume condition

Trigger condition: Open circuit of V-phase lower tube corresponding to compressor.
 Resume condition: Check whether the IPM module is working.

Reset method: Change the module board. Power on and start up again.
Possible causes

There IPM module is damaged.
Procedure
 Check whether the IPM virtual welding and the PWM related transmission circuit of the MCU are connected to the welding.
If so, change the replace the drive board.
6.21 L6E: Open circuit of W-phase upper tube
Description
 Open circuit of W-phase upper tube.

After the fault, the compressor stops running, and if the fault disappears after one minute, the compressor starts again.
Trigger/resume condition

Trigger condition: Open circuit of W-phase upper tube corresponding to compressor.

Resume condition: Check whether the IPM module is working.
 Reset method: Change the module board. Power on and start up again.
Possible causes

There IPM module is damaged.