ACV HeatMaster 201 - Locking Codes; Fault Codes E82-E99

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LOCKING CODES
Codes Description of the fault Solution for the fault
E82 Delta T protection blocking - Delta T too high
1. Verify  ow in the system.
2. Check pump for blockage and obstructions, unblock it as required. Replace if neccessary.
E83 Delta T protection Lock-out - Lock-out due to Delta T value.
1. Verify  ow in the system.
2. Check pump for blockage and obstructions, unblock it as required. Replace if neccessary.
E 85 Pump operation: warning - Appliance pump is running out of limits. Pump is running out of its limits. Check pump for blockage and obstructions, replace if neccessary
E 86 Pump hard fault: Pump Failure Pump Failure, check if pump PWM-feedback wire is properly connected, replace pump when neccessary
E 87 External Limit Open: An external appliance limit has opened.
1. Correct condition which caused limit to open, then reset appliance.
2. The appliance needs to be reset once external limit closes.
E88 Pump Blocking: Pump attempts to restart. Check pump for blockage and obstructions, unblock it as required. Replace if neccessary.
E 89 Incorrect Setting: A parameter setting is outside the settings range.
1. Review CH & DHW settings and correct as necessary.
2. The appliance will automatically reset once corrected.
E 90
Firmware Mismatch: Control module and display  rmware versions are incompat-
ible.
One or several components are not compatible with the system. Replace mismatched component(s).
E 91
System Sensor Shorted: A short circuit has been detected in the system tempera-
ture sensor circuit
1. Check system temperature sensor and wiring for a short circuit.
2. If necessary replace the sensor, or the wire harness.
3. After  xing the problem reset the appliance and resume normal operation.
E 92
System Sensor Open: An open circuit has been detected in the system temperature
sensor circuit.
1. Check system temperature sensor and wiring for an open circuit.
2. If necessary replace the sensor, or the wire harness.
3. After  xing the problem reset the appliance and resume normal operation.
E 93
Outdoor Sensor Shorted: A short circuit has been detected in the outdoor tem-
perature sensor circuit.
1. Check outdoor temperature sensor and wiring for a short circuit.
2. If necessary replace the sensor, or the wire harness.
3. After  xing the problem reset the appliance and resume normal operation.
E 94 Internal Display Fault: Display memory error Turn unit o and on to resume normal operation.
E 95 Supply Sensor Error: Supply sensor reading is invalid
1. Check wiring between display and control module.
2. If necessary replace the sensor, or the wire harness.
3. After  xing the problem reset the appliance and resume normal operation.
E 96
Outdoor Sensor Open: An open circuit has been detected in the outdoor tempera-
ture sensor circuit.
1. Check outdoor temperature sensor and wiring for an open circuit.
2. If necessary replace the sensor, or the wire harness.
3. After  xing the problem reset the appliance and resume normal operation.
E 97 Cascade Mismatch: Cascade con guration has changed.
1. Run autodetection if change was intentional, or else check wiring between appliances.
2. Appliance will automatically reset once repaired.
E 98 Cascade Bus Error: Communication with other appliances has been lost.
1. Check wiring between appliances.
2. Appliance will automatically reset once repaired.
E 99
Controller Bus Error: Communication between appliance display and control
module has been lost.
1. Check wiring between components.
2. Appliance will automatically reset once repaired.