E462 on a Samsung heat pump: All currency control COMP Stop Or CT2 Low currency
Short answer
On a Samsung heat pump, E462 means: All currency control COMP Stop Or CT2 Low currency. The heat pump stops until the fault clears or is reset. An engineer is needed to fix the cause. The wording differs by model range — each is shown below.
Reviewed 23 September 2026 · 3 sources
What it means
On the EHS Mono R290 (AE***CXYD*K and pump-integrated AE***CXYB*K)
The manual says: All currency control COMP Stop Or CT2 Low currency.
Part involved: Inverter PCB / compressor.
When it shows: Unit self-diagnosis: All currency control COMP Stop Or CT2 Low currency.
Likely causes:
- Inverter/compressor drive fault: supply voltage issue, compressor wiring/winding, IPM/PFC/sensor fault on inverter PCB, refrigerant or airflow problem causing overcurrent/overheat.
- Engineer checks per Samsung service manual: Check input power, refrigerant charge and normal operation of outdoor fan.
On the EHS Mono R32 (AE***RXYD*G)
The manual says: [Inverter] Total current error/PFC over current error.
Part involved: Inverter PCB / compressor.
When it shows: Unit self-diagnosis: [Inverter] Total current error/PFC over current error.
Likely causes:
- Inverter/compressor drive fault: supply voltage issue, compressor wiring/winding, IPM/PFC/sensor fault on inverter PCB, refrigerant or airflow problem causing overcurrent/overheat.
- Engineer checks per Samsung service manual: Check input power, refrigerant charge and normal operation of outdoor fan.
On the EHS Split Generation 4 (AEX/AEN, 2014)
The manual says: Primary Current Trip error.
Part involved: Inverter PCB / compressor.
When it shows: Unit self-diagnosis: Primary Current Trip error.
Likely causes:
- Inverter/compressor drive fault: supply voltage issue, compressor wiring/winding, IPM/PFC/sensor fault on inverter PCB, refrigerant or airflow problem causing overcurrent/overheat.
- Engineer checks per Samsung service manual: Check input power, refrigerant charge and normal operation of outdoor fan.
Is it safe?
| Does the heat pump stop? | Yes |
|---|---|
| Engineer needed? | Yes |
The heat pump stops until the fault clears or is reset.
Resetting itself: unknown.
Manual reset: unknown.
What you can check
- Note the full error code shown on the controller; check the heat pump breaker/isolator in the consumer unit is ON; check the outdoor unit is not blocked by leaves, debris or snow and air can flow freely; then contact your installer or Samsung service; Samsung manuals do not describe a homeowner reset for this code.
What the engineer will check
On the EHS Mono R290 (AE***CXYD*K and pump-integrated AE***CXYB*K)
- Check input power, refrigerant charge and normal operation of outdoor fan. Any work inside casings, on PCBs, wiring, sensors, pumps, valves or refrigerant is engineer-only.
Who to ask for: Heat pump engineer with electrical and refrigeration competence; R290 (A3 flammable refrigerant) competence.
Certification: Competent electrical worker (BS 7671); F-gas certification if refrigerant circuit is opened; R290/flammable refrigerant handling training (e.g. hydrocarbon refrigerant course).
On the EHS Mono R32 (AE***RXYD*G)
- Check input power, refrigerant charge and normal operation of outdoor fan. Any work inside casings, on PCBs, wiring, sensors, pumps, valves or refrigerant is engineer-only.
Who to ask for: Heat pump engineer with electrical and refrigeration competence.
Certification: Competent electrical worker (BS 7671); F-gas certification if refrigerant circuit is opened.
On the EHS Split Generation 4 (AEX/AEN, 2014)
- Check input power, refrigerant charge and normal operation of outdoor fan. Any work inside casings, on PCBs, wiring, sensors, pumps, valves or refrigerant is engineer-only.
Who to ask for: Heat pump engineer with electrical and refrigeration competence.
Certification: Competent electrical worker (BS 7671); F-gas certification if refrigerant circuit is opened.
What you might notice
What owners and engineers report
9 owner and engineer reports mention this.
- No heating on the EHS Mono R32 (AE***RXYD*G): 6 reports
- Keeps stopping / cutting out on the EHS Mono R32 (AE***RXYD*G): 2 reports
- Intermittent fault on the EHS Mono R32 (AE***RXYD*G): 1 report
Sources
- EHS R290 Mono Outdoor Unit Installation Manual AE***CXYD** (EU) DB68-12496A-03 ↗ · DB68-12496A-03 · page p.24 · Reviewed 23 September 2026
- EHS R-32 Mono Outdoor Unit Installation Manual (EU) DB68-08408A-07 ↗ · DB68-08408A-07 · page p.43 · Reviewed 23 September 2026
- Samsung Eco Heating System Service Manual - Outdoor Unit AEX060-160ED*HA / Hydro Unit AEN080/160YD*HA (file RC160MHXGA_SM_E_34513A(1)) ↗ · 34513A(1) · page ManualsLib viewer p.52 (printed p.51) · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026