Error code reference

Sub-Zero Freezer Error Code 87

Speed information from electronic control board is out of specification (700TF/I-2V only).

SourceSub-Zero Freezer - Service Manual: Integrated (700-2) Seriesp. 3-24, 8-5

Diagnostic procedure

The full 87 procedure

Step 1 is visible so you can confirm you are on the right page. The remaining steps, the ones that tell you whether to actually replace a part, unlock with any pass.

MyPros+ · DiagnosticsStep 1 preview

First diagnostic step

If not experiencing cooling problems, clear error code. If cooling problems exist, check serial communication wire leads between control board and VS compressor controller.

SourceSub-Zero Freezer - Service Manual: Integrated (700-2) Seriesp. 3-24, 8-5

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More steps, wiring diagram references, and verified part numbers

Includes expected resistance and voltage values, connector pinouts, and supersession notes for replacement parts.

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Where this code is documented

4 manuals in the MyPros+ library document this code for Sub-Zero freezer.

Models covered by the manuals that document this code

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The full 87 procedure

Where this code is documented

Models covered by the manuals that document this code

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