Heat pumps · Error codes · Ochsner
Er201Ochsner · OTE 3 / OTE 4 controller fault platform (error-code grouping)
Er201 on an Ochsner OTE 3 / OTE 4 controller fault platform: Insufficient condensation - check the refrigerant circuit (OCHSNER) (older OTE3 SW5x wording)
Short answer
On an Ochsner heat pump, Er201 means: Insufficient condensation - check the refrigerant circuit (OCHSNER) (older OTE3 SW5x wording). 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: Insufficient condensation - check the refrigerant circuit (OCHSNER) (older OTE3 SW5x wording).
Part involved: Insufficient condensation - check the refrigerant circuit (OCHSNER) (older OTE3 SW5x wording).
Is it safe?
| Does the heat pump stop? | Partly |
|---|---|
| Severity | Fault — needs a manual reset once the cause is fixed |
| Engineer needed? | Yes |
The heat pump keeps running with some functions stopped.
What you can check
- Note the Er number and text and contact your OCHSNER system partner.
What the engineer will check
- Check refrigerant circuit.
Who to ask for: OCHSNER service partner.
What you might notice
Sources
- OCHSNER GMLW Installation and Operating Instructions, OTE3 SW5x, V8.2 ↗ · V8.2 · page 16 · Reviewed 23 September 2026
A code explains what the controller detected, not a confirmed root cause.
Reviewed: 23 September 2026