Heat pumps · Error codes · Midea
J47Midea · M-Thermal Arctic HT R290 monobloc (MHC ...WD2N7)
J47 on a Midea M-Thermal Arctic HT R290 monobloc: Fan drive module type mismatch (after module resistance tested)
Short answer
On a Midea heat pump, J47 means: Fan drive module type mismatch (after module resistance tested). 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: Fan drive module type mismatch (after module resistance tested).
Likely causes:
- See R290 service manual troubleshooting (section 6) for this code.
Is it safe?
Switch the heat pump off at its isolator and call an engineer.
| Does the heat pump stop? | Not stated |
|---|---|
| Engineer needed? | Yes |
The manual does not say whether the heat pump stops.
What you can check
- Read and note the exact code shown on the controller display.
- Check the heat pump's breaker/isolator at the consumer unit is on.
- If the breaker has tripped or trips again, leave the unit off and call an engineer; do not keep resetting it.
What the engineer will check
- See R290 service manual troubleshooting (section 6) for this code.
Sources
- R290 M thermal Arctic HT Series Service Manual ↗ · 2025-10-15 v5 (from file name) · page 93 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026