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HTPGKensa

HTPG on a Kensa heat pump: Ground side pressure P2 exceeds the high-pressure limit

Short answer

On a Kensa heat pump, HTPG means: Ground side pressure P2 exceeds the high-pressure limit. The heat pump stops until the fault clears or is reset. An engineer is needed to fix the cause.

Reviewed 23 September 2026 · 4 sources

What it means

The manual says: Ground side pressure P2 exceeds the high-pressure limit.

Part involved: P2 ground pressure.

When it shows: Error level per manual: Fault.

Likely causes:

  • Ground-side pressure above the set high limit; release pressure and check water pressures in commissioning mode.
  • General practice: over-filled ground loop, inadequate expansion.

Is it safe?

Does the heat pump stop?Yes
SeverityFault — clears by itself when the condition goes
Engineer needed?Yes

The heat pump stops until the fault clears or is reset.

Resetting itself: yes - clears when condition clears (per manual action text).

Manual reset: unknown.

What you can check

  • Note the code shown on the controller/LED; check the heat pump isolator and consumer-unit breaker are on; check thermostat/timer settings. Read the ground-side pressure on the controller diagnostics screen and note it; do not add water to the ground loop.

What the engineer will check

  • Follow Kensa fault table actions: Ground-side pressure above the set high limit; release pressure and check water pressures in commissioning mode.

Who to ask for: GSHP / ground-loop installer.

Certification: MCS-certified GSHP installer recommended; Kensa-trained.

What you might notice

Sources

A code explains what the controller detected, not a confirmed root cause.

Reviewed: 23 September 2026