Heat pumps · Error codes · Ideal Heating
499Ideal Heating · Logic Air
499 on an Ideal Heating Logic Air: No outdoor connection Fault
Short answer
On an Ideal Heating heat pump, 499 means: No outdoor connection Fault. 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: No outdoor connection Fault.
Part involved: outdoor unit to control box interconnection.
Likely causes:
- Wiring from heat pump to indoor unit (control box) insecure or incorrectly connected (L-L, N-N, E-E, COM-COM); faulty indoor-unit 'Fujitsu' interface PCB.
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. If the fault clears after the installer-approved restart via the controller and does not return, note it for the next service; if it returns, call an engineer.
What the engineer will check
- Check interconnecting cable is secure and correctly terminated; replace indoor unit Fujitsu interface PCB.
Who to ask for: Heat pump / heating controls engineer.
Certification: Electrical work by competent person.
What you might notice
Sources
- Logic Air Monobloc Heat Pump System - Installation & Maintenance (UIN 241428 A03) ↗ · UIN 241428 A03 · page 83 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026