E6 Fault Code – WSHV‑S / WSHV‑T Indoor–Outdoor Communication & Model Mismatch Error

Applies To

✅ Braemar WSHV Series 

• WSHV‑S Airvolution™ Wall Split
• WSHV‑T Airvolution™ Wall Split

❌ Not applicable to:

• LSHV / KSHV wall splits
• SDHV / KDHV ducted systems
• Cassette, Bulkhead, Multi or Add‑On Cooling units

Source Reference

Braemar Residential Service Guide – ES E247‑A (Effective November 2023)

• WSHV‑S Series: Page 10
• WSHV‑T Series: Page 12

Fault Description

E6 indicates a communication fault caused by incorrect indoor–outdoor unit pairing within the WSHV range.

In ES E247‑A, E6 is explicitly defined only for WSHV systems and occurs when a WSHV‑S and WSHV‑T unit are incorrectly mixed.

? This is not a generic inverter communication fault across all Braemar products.

Customer Symptoms

• Indoor display shows E6
• Unit does not start or stops immediately after power‑up
• No heating or cooling operation
• Outdoor unit inoperative
• Fault appears immediately (no run time)

Confirmed Root Cause

❌ Indoor–Outdoor Model Mismatch (Design Restriction)

The service guide states:

• WSHV‑S indoor units will NOT operate with WCHV‑T outdoor units
• WSHV‑T indoor units will NOT operate with WCHV‑S outdoor units

In either scenario, E6 will be displayed and normal operation is impossible.

Diagnostic Procedure (WSHV Series Only)

Step 1 – Identify Indoor Unit Model

Check rating plate:

• WSHVxxD1S → WSHV‑S indoor
• WSHVxxD1T → WSHV‑T indoor

Step 2 – Identify Outdoor Unit Model

Check rating plate:

• WCHVxxD1S → WSHV‑S outdoor
• WCHVxxD1T → WSHV‑T outdoor

Step 3 – Confirm Correct Pairing

✅ Valid pairings

• WSHV‑S indoor ↔ WCHV‑S outdoor
• WSHV‑T indoor ↔ WCHV‑T outdoor

❌ Invalid pairings (E6 will always occur)

• WSHV‑S indoor ↔ WCHV‑T outdoor
• WSHV‑T indoor ↔ WCHV‑S outdoor

Step 4 – Power Reset

• Isolate power to indoor and outdoor
• Wait 5 minutes
• Restore power

⚠ If pairing is incorrect, E6 will reappear immediately

Step 5 – Wiring & PCB Checks (Only if Pairing Is Correct)

If correct S↔S or T↔T pairing is confirmed:

• Inspect communication wiring for damage or incorrect termination
• Check terminal tightness and polarity
• Substitute known‑good PCB if required

⚠ Do not pursue PCB replacement until pairing is confirmed correct

Resolution Summary

Key Technical Notes

• E6 in ES E247‑A is only defined for WSHV systems
• E6 is not listed in:
  • General wall split error code tables
  • Ducted split error code charts
• Treat E6 as a hard compatibility fault, not a universal comms error
• No refrigerant work is required for this fault