Carrier 38MBRQ48A-3 - Voltage Protection Errors (P1) Diagnosis; Troubleshooting Voltage Protection Issues

38MBR: Service Manual
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
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Over Voltage or Too Low Voltage Protection Diagnosis and Solution (P1)
Troubleshooting
Fig. 27 — Test
Error Code P1
Malfunction decision conditions An abnormal current rise is detected by checking the specified current detection circuit.
Supposed Causes
• Power supply problems
• System leakage or blockage
• PCB faulty
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