
Error Message Diagnostic Flow
Other PV 900 Companion Cold
Error Message Diagnostic Flow
This approach guides you through investigating error codes displayed on the machine, starting with recording the message and tracing it to the affected subsystem.
Qualified technician handoff: stop before live electrical testing, sealed-system refrigeration work, compressor service, or protected-compartment access unless a qualified technician is handling the work.
- Error appeared after electrical event such as lightning or power surge: comprehensive_inspection_before_continuing
- Error accompanied by smell, heat, or visible damage: stop_and_hand_off
- If the error appeared after an electrical event such as lightning or a power surge, a comprehensive inspection by a qualified technician is required.
- If the error is accompanied by a smell, heat, or visible damage, stop immediately and hand off to a qualified technician.
Checklist
Guided Diagnostic Steps
Work from low-risk checks toward technician-level inspection only when evidence supports it.
You can read or print the route now. The first checkbox click opens the service contact gate.
- 1
Record the exact error message displayed on the screen, including any...
operator-intermediatehighRecord the exact error message displayed on the screen, including any accompanying codes.
Stop conditions- If the error appeared after an electrical event such as lightning or a power surge, a comprehensive inspection by a qualified technician is required.
- If the error is accompanied by a smell, heat, or visible damage, stop immediately and hand off to a qualified technician.
- All electrical diagnostics related to error codes must be performed by a qualified technician.
Expected: Initial condition is documented before deeper diagnosis.
Evidence to note: note
- 2
Check the immediate area around the control board for any visible sig...
operator-intermediatehighCheck the immediate area around the control board for any visible signs of recent electrical events or damage.
Stop conditions- If the error appeared after an electrical event such as lightning or a power surge, a comprehensive inspection by a qualified technician is required.
- If the error is accompanied by a smell, heat, or visible damage, stop immediately and hand off to a qualified technician.
- All electrical diagnostics related to error codes must be performed by a qualified technician.
Expected: Initial condition is documented before deeper diagnosis.
Evidence to note: note
- 3
Record the error message and any associated codes.
operator-intermediatehighRecord the error message and any associated codes.
Stop conditions- If the error appeared after an electrical event such as lightning or a power surge, a comprehensive inspection by a qualified technician is required.
- If the error is accompanied by a smell, heat, or visible damage, stop immediately and hand off to a qualified technician.
- All electrical diagnostics related to error codes must be performed by a qualified technician.
Expected: Result is documented before continuing the route.
Evidence to note: note
- 4
Visually inspect the machine for signs of recent power surges or exte...
operator-intermediatehighVisually inspect the machine for signs of recent power surges or external impacts.
Stop conditions- If the error appeared after an electrical event such as lightning or a power surge, a comprehensive inspection by a qualified technician is required.
- If the error is accompanied by a smell, heat, or visible damage, stop immediately and hand off to a qualified technician.
- All electrical diagnostics related to error codes must be performed by a qualified technician.
Expected: Result is documented before continuing the route.
Evidence to note: note
- 5
Stop and document the machine state for technician review.
operator-intermediatehighStop and document the machine state for technician review.
Stop conditions- If the error appeared after an electrical event such as lightning or a power surge, a comprehensive inspection by a qualified technician is required.
- If the error is accompanied by a smell, heat, or visible damage, stop immediately and hand off to a qualified technician.
- All electrical diagnostics related to error codes must be performed by a qualified technician.
Expected: Result is documented before continuing the route.
Evidence to note: note
Tools for this route
Parts status
Exact public parts list not verified yet. Use this route to identify the system before ordering.
Candidate areas for part verification
Other Possible Issues
Switch routes if this symptom is not the closest match.
