E702 on a Samsung heat pump: Error due to closed EEV of indoor unit(1st detection)
Short answer
On a Samsung heat pump, E702 means: Error due to closed EEV of indoor unit(1st detection). 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: Error due to closed EEV of indoor unit(1st detection).
Part involved: Electronic expansion valve (EEV).
When it shows: Unit self-diagnosis: Error due to closed EEV of indoor unit(1st detection).
Likely causes:
- Electronic expansion valve (EEV) fault: coil, connector, valve body or leakage.
- Engineer checks per Samsung service manual: Check indoor unit EEV (closed) on TDM system.
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; then contact your installer or Samsung service; Samsung manuals do not describe a homeowner reset for this code.
What the engineer will check
- Check indoor unit EEV (closed) on TDM system. Any work inside casings, on PCBs, wiring, sensors, pumps, valves or refrigerant is engineer-only.
Who to ask for: F-gas certified refrigeration/heat pump engineer.
Certification: F-gas certification (UK F-gas Regulation).
What you might notice
Sources
- SPLIT/TDM PLUS Hydro Unit User manual AE090/160JNYD*H, AE090/160MNYD*H DB68-07003A-08 ↗ · DB68-07003A-08 · page p.59 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026