182 on a Mitsubishi Heavy Industries Air-Conditioning Europe Hydrolution: Load monitor active: Measured power consumption for at least one phase exceeds the fuse size specified in the menu
Short answer
On a Mitsubishi Heavy Industries Air-Conditioning Europe heat pump, 182 means: Load monitor active: Measured power consumption for at least one phase exceeds the fuse size specified in the menu. The heat pump keeps running with some functions stopped. An engineer is needed to fix the cause.
Reviewed 23 September 2026 · 1 source
What it means
The manual says: Load monitor active: Measured power consumption for at least one phase exceeds the fuse size specified in the menu.
Part involved: Load monitor active.
When it shows: Measured power consumption for at least one phase exceeds the fuse size specified in the menu.
Likely causes:
- Phase loading; a larger main fuse may be needed.
Is it safe?
| Does the heat pump stop? | Partly |
|---|---|
| Severity | Fault — clears by itself when the condition goes |
| Engineer needed? | Yes |
The heat pump keeps running with some functions stopped.
Resetting itself: yes.
Manual reset: no.
What you can check
- Note the alarm number/text shown on the display. Check the consumer-unit breakers/isolators for the indoor and outdoor units are on. Heavy simultaneous electrical loads (e.g. oven, shower, EV charger) can trigger load/voltage alarms - note what was running. This is an information message; it resets automatically when the cause is removed.
What the engineer will check
- Per manual 'May be due to': Phase loading; a larger main fuse may be needed. Check sensor wiring/resistance, settings, flow (particle filter, pump) and supply as applicable.
Who to ask for: Heat pump / refrigeration engineer (manufacturer-trained).
Certification: F-gas certification for refrigerant-circuit work; electrical competence (Part P/18th Edition) for PCB/wiring.
What you might notice
Sources
- Installation Manual - Air to Water Heat Pump using R32 refrigerant, Hydrolution (HM) ↗ · PSC012D169 (202201) · page PDF p.87 (printed 85) · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026