Heat pumps · Error codes · Danfoss
max-temp-elec-hwDanfoss · DHP-AQ
max-temp-elec-hw on a Danfoss DHP-AQ: Too high temperature in heat pump junction box/electrical cabinet
Short answer
On a Danfoss heat pump, max-temp-elec-hw means: Too high temperature in heat pump junction box/electrical cabinet. The manual does not say whether the heat pump stops. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: Too high temperature in heat pump junction box/electrical cabinet.
Part involved: cabinet temperature.
Likely causes:
- Overheating of electrical cabinet (causes not tabulated).
Is it safe?
| Does the heat pump stop? | Not stated |
|---|---|
| Engineer needed? | Yes |
The manual does not say whether the heat pump stops.
Manual reset: Set operating mode OFF then back to the desired mode.
What you can check
- Note the exact alarm text. Note the alarm and call an engineer; check nothing is covering or blocking ventilation around the unit. The manual allows acknowledging by setting operating mode OFF then back once; if the alarm returns, call an engineer.
What the engineer will check
- Inspect cabinet ventilation, loose/overheating connections, component heat.
Who to ask for: heat pump engineer.
Certification: Qualified electrician / heat pump engineer (electrical fault-finding).
What you might notice
Sources
- Service Instructions DHP-AQ (VMGFJ202) ↗ · VMGFJ202 · page p.10 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026