LED-9B on an Ideal Heating Logic Air: Circulation pump error
Short answer
On an Ideal Heating heat pump, LED-9B means: Circulation pump error. The heat pump stops until the fault clears or is reset. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: Circulation pump error.
Part involved: outdoor unit circulation pump.
When it shows: 2 s after pump power-on, pump feedback out of range; compressor and pump stop.
Likely causes:
- 1. Sludge filter trap clogged 2. Circulating pump blocked/failed/malfunctioning 3. Pump-PCB connection.
Is it safe?
| Does the heat pump stop? | Yes |
|---|---|
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
What you can check
- Note the code or fault message shown on the controller/Halo and when it appeared; check the heat pump's isolator and consumer-unit breaker are on. Read the heating system pressure gauge (compare it with the pressure your installer set) and report it; check the filling loop is closed.
What the engineer will check
- Read pump fault status on indoor HMI; check pump not blocked and correctly supplied; replace circulation pump; if persists replace hydraulic PCB and main PCB.
Who to ask for: Heat pump engineer; casing removal only by persons competent with R32 (A2L); refrigerant-circuit work requires Cat I/II F-gas certification (I&M p.75 warning).
Certification: F-gas Cat I/II for refrigerant work; electrical work by competent person.
What you might notice
Sources
- Maintenance Manual LOGIC AIR 8-10 Air/water heat pump Monobloc system (U0753484_2451_EN_1) ↗ · U0753484_2451_EN_1 · page 29 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026