BWT Perla
BWT Perla Water Softeners Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
Advertisements
E01
Display shows E01 and the unit does not start regeneration
Inlet Water Supply Fault
E02
Display shows E02 and regeneration stops shortly after starting
Drain Line / Brine Rinse Flow Fault
E03
Display shows E03 and the unit remains in service without regenerating
Flow Meter / Turbine Sensor Fault
E04
Display shows E04 and regeneration does not complete
Motorized Valve Positioning Fault
E05
Display shows E05 and the unit does not draw brine during regeneration
Brine Suction / Injector Fault
E06
Display shows E06 and the unit overfills the brine tank or shows abnormal brine level
Brine Fill / Safety Float Fault
E07
Display shows E07 and the unit reports a salt level or brine sensor error
Salt Level / Brine Sensor Fault
E08
Display shows E08 and the unit does not detect water level correctly in the brine tank
Brine Level Detection Fault
E09
Display shows E09 and the unit reports a temperature or frost protection error
Temperature Sensor Fault
E10
Display shows E10 and the unit does not respond to keypad presses
Keypad / User Interface Fault
E11
Display shows E11 and the unit loses time or program settings frequently
Real-Time Clock / Backup Power Fault
E12
Display shows E12 and the unit indicates a communication error between modules
Internal Communication Bus Fault
E13
Display shows E13 and the unit reports an internal memory or configuration error
EEPROM / Configuration Data Fault
E14
Display shows E14 and the unit indicates an overload or short-circuit on a valve output
Output Driver Overcurrent Fault
E15
Display shows E15 and the unit reports an internal sensor calibration error
Internal Sensor Calibration Fault
E16
Display shows E16 and the unit indicates an abnormal regeneration duration
Regeneration Time-Out Fault
E17
Display shows E17 and the unit reports excessive water consumption or leak alarm
Continuous Flow / Leak Detection Fault
E18
Display shows E18 and the unit indicates a hardness sensor or quality sensor error (if equipped)
Water Hardness / Quality Sensor Fault
E19
Display shows E19 and the unit indicates an external input or contact fault (e.g., external lock, remote signal)
External Control Input Fault
Symptom
Brine tank does not refill with water after regeneration
No Brine Refill
Symptom
Brine tank fills with water but salt does not dissolve properly (salt bridge)
Salt Bridging in Brine Tank
Symptom
BWT Perla causes noticeable pressure drop or low flow at taps during normal service
Flow Restriction in Service Mode
Symptom
BWT Perla display is on but buttons do not respond or respond intermittently
Keypad Contact Wear / UI Malfunction
Symptom
BWT Perla does not draw brine from the tank during regeneration (brine level does not drop)
No Brine Suction
Symptom
BWT Perla does not start regeneration at the programmed time
Regeneration Scheduling Fault
Symptom
BWT Perla emits a burning smell or shows signs of overheating at the control head
Electrical Overheating / Component Failure
Symptom
BWT Perla emits a musty or unpleasant odor from the brine tank
Biological Growth / Contamination in Brine Tank
Symptom
BWT Perla frequently switches between service and regeneration or seems to restart cycles unexpectedly
Unstable Control / Power Interruption
Symptom
BWT Perla is completely dead: no display, no lights
No Power / Power Supply Failure
Symptom
BWT Perla is noisy during regeneration (loud clicking, grinding, or humming)
Valve Head Mechanical Noise
Symptom
BWT Perla makes a constant humming sound but does not change valve position
Stalled Valve Motor
Symptom
BWT Perla occasionally delivers salty-tasting water immediately after regeneration
Residual Brine Carryover
Symptom
BWT Perla regenerates too frequently, using excessive salt and water
Over-Regeneration / Oversized Safety Margin
Symptom
BWT Perla shows condensation or water droplets inside the control housing
Moisture Ingress / Condensation
Symptom
Water at taps is slightly soft but not as soft as expected (residual hardness too high)
Partial Softening / Incorrect Blending
Symptom
Water leaks from around the BWT Perla valve head or top of the resin vessel
Valve Head / Tank O-Ring Leak
Symptom
Water leaks from connections on the inlet, outlet, or bypass of the BWT Perla
Plumbing Connection Leak
Symptom
Water leaks from the brine tank or around the brine well
Brine Tank / Brine Well Leak
Symptom
Water remains hard at taps even though the BWT Perla appears to operate normally
Insufficient Softening / Resin Exhaustion
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Display shows E01 and the unit does not start regeneration
|
Inlet Water Supply Fault | View Details |
| E02 |
Display shows E02 and regeneration stops shortly after starting
|
Drain Line / Brine Rinse Flow Fault | View Details |
| E03 |
Display shows E03 and the unit remains in service without regenerating
|
Flow Meter / Turbine Sensor Fault | View Details |
| E04 |
Display shows E04 and regeneration does not complete
|
Motorized Valve Positioning Fault | View Details |
| E05 |
Display shows E05 and the unit does not draw brine during regeneration
|
Brine Suction / Injector Fault | View Details |
| E06 |
Display shows E06 and the unit overfills the brine tank or shows abnormal brine level
|
Brine Fill / Safety Float Fault | View Details |
| E07 |
Display shows E07 and the unit reports a salt level or brine sensor error
|
Salt Level / Brine Sensor Fault | View Details |
| E08 |
Display shows E08 and the unit does not detect water level correctly in the brine tank
|
Brine Level Detection Fault | View Details |
| E09 |
Display shows E09 and the unit reports a temperature or frost protection error
|
Temperature Sensor Fault | View Details |
| E10 |
Display shows E10 and the unit does not respond to keypad presses
|
Keypad / User Interface Fault | View Details |
| E11 |
Display shows E11 and the unit loses time or program settings frequently
|
Real-Time Clock / Backup Power Fault | View Details |
| E12 |
Display shows E12 and the unit indicates a communication error between modules
|
Internal Communication Bus Fault | View Details |
| E13 |
Display shows E13 and the unit reports an internal memory or configuration error
|
EEPROM / Configuration Data Fault | View Details |
| E14 |
Display shows E14 and the unit indicates an overload or short-circuit on a valve output
|
Output Driver Overcurrent Fault | View Details |
| E15 |
Display shows E15 and the unit reports an internal sensor calibration error
|
Internal Sensor Calibration Fault | View Details |
| E16 |
Display shows E16 and the unit indicates an abnormal regeneration duration
|
Regeneration Time-Out Fault | View Details |
| E17 |
Display shows E17 and the unit reports excessive water consumption or leak alarm
|
Continuous Flow / Leak Detection Fault | View Details |
| E18 |
Display shows E18 and the unit indicates a hardness sensor or quality sensor error (if equipped)
|
Water Hardness / Quality Sensor Fault | View Details |
| E19 |
Display shows E19 and the unit indicates an external input or contact fault (e.g., external lock, remote signal)
|
External Control Input Fault | View Details |
| – |
Brine tank does not refill with water after regeneration
|
No Brine Refill | View Details |
| – |
Brine tank fills with water but salt does not dissolve properly (salt bridge)
|
Salt Bridging in Brine Tank | View Details |
| – |
BWT Perla causes noticeable pressure drop or low flow at taps during normal service
|
Flow Restriction in Service Mode | View Details |
| – |
BWT Perla display is on but buttons do not respond or respond intermittently
|
Keypad Contact Wear / UI Malfunction | View Details |
| – |
BWT Perla does not draw brine from the tank during regeneration (brine level does not drop)
|
No Brine Suction | View Details |
| – |
BWT Perla does not start regeneration at the programmed time
|
Regeneration Scheduling Fault | View Details |
| – |
BWT Perla emits a burning smell or shows signs of overheating at the control head
|
Electrical Overheating / Component Failure | View Details |
| – |
BWT Perla emits a musty or unpleasant odor from the brine tank
|
Biological Growth / Contamination in Brine Tank | View Details |
| – |
BWT Perla frequently switches between service and regeneration or seems to restart cycles unexpectedly
|
Unstable Control / Power Interruption | View Details |
| – |
BWT Perla is completely dead: no display, no lights
|
No Power / Power Supply Failure | View Details |
| – |
BWT Perla is noisy during regeneration (loud clicking, grinding, or humming)
|
Valve Head Mechanical Noise | View Details |
| – |
BWT Perla makes a constant humming sound but does not change valve position
|
Stalled Valve Motor | View Details |
| – |
BWT Perla occasionally delivers salty-tasting water immediately after regeneration
|
Residual Brine Carryover | View Details |
| – |
BWT Perla regenerates too frequently, using excessive salt and water
|
Over-Regeneration / Oversized Safety Margin | View Details |
| – |
BWT Perla shows condensation or water droplets inside the control housing
|
Moisture Ingress / Condensation | View Details |
| – |
Water at taps is slightly soft but not as soft as expected (residual hardness too high)
|
Partial Softening / Incorrect Blending | View Details |
| – |
Water leaks from around the BWT Perla valve head or top of the resin vessel
|
Valve Head / Tank O-Ring Leak | View Details |
| – |
Water leaks from connections on the inlet, outlet, or bypass of the BWT Perla
|
Plumbing Connection Leak | View Details |
| – |
Water leaks from the brine tank or around the brine well
|
Brine Tank / Brine Well Leak | View Details |
| – |
Water remains hard at taps even though the BWT Perla appears to operate normally
|
Insufficient Softening / Resin Exhaustion | View Details |
No matching codes found
Advertisements