Norcold N6XX/N8XX Series Refrigerator Service Manual

About this manual

Norcold N6XX/N8XX Series Refrigerator Service Manual describes troubleshooting for a no co fault code, meaning no cooling detected by the controls. It includes checks for ventilation obstructions, leveled operation, cooling at the fin assembly, and cooling unit replacement when the code appears before a full cooling cycle.

The manual also gives power board reset procedures. Earlier controls are reset by jumpering Pin 15 to ground, while later units use an optical display reset or Procedure 2 or Procedure 3 depending on model and serial number.

What's inside

• no co fault code: no cooling detected by the controls
• Power board reset procedure
• Figure C – reset procedure
• Figure D – reset procedure
• Procedure 2 reset applicability
• Procedure 3 reset applicability
• Cooling unit replacement
• Ventilation and leveling checks

Frequently asked questions

What does the "no co" fault code indicate?

It indicates no cooling detected by the controls.

How is the power board reset on earlier controls?

Jumper Pin 15 on the 16-pin connector to the power board ground lug for 10-15 seconds.

What wire can be used for the Pin 15 reset jumper?

A six inch long insulated 22 AWG wire with 1/2 inch of insulation stripped from each end.

When should the cooling unit be replaced?

Replace it if the "no co" code shows before completing a full cooling cycle.