Trianco (TR Engineering) · A niche brand in the UK. 201 codes across 8 product families, each taken from the manufacturer’s manuals. Trianco technical support ↗
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201 codes
| Code | Meaning | Stops? | Homeowner check? |
|---|---|---|---|
| 01 | Water cylinder temperature cutout activated | Yes | Yes |
| 02 | Compressor sensor cutout activated | Yes | Yes |
| 03 | Compressor outlet temperature cycle | Yes | Yes |
| 05 | Ambient temperature cycle | Yes | Yes |
| 06 | Coil temperature cycle | Yes | Yes |
| 07 | Programmer cutout activated | Yes | Yes |
| 08 | Refrigerant pressure cutout #1 | Yes | Yes |
| 09 | Refrigerant pressure cutout #2 | Yes | Yes |
| ALRM001 | Temperature probe malfunction | Not stated | Yes |
| ALRM002 | Low-pressure switch tripped | Not stated | Yes |
| ALRM003 | High-pressure switch tripped | Not stated | Yes |
| ALRM004 | Inverter driver high temperature | Not stated | Yes |
| ALRM006 | Inverter driver error | Not stated | Yes |
| ALRM007 | Compressor suction low temperature | Not stated | Yes |
| ALRM008 | Compressor discharge high temperature | Not stated | Yes |
| ALRM009 | Communication error | Not stated | Yes |
| ALRM010 | Evaporator liquid refrigerant low temperature | Not stated | Yes |
| ALRM012 | Fan malfunction | Not stated | Yes |
| ALRM017 | Plant flowmeter tripped | Not stated | Yes |
| ALRM022 | High water temperature during domestic hot water production | Not stated | Yes |
| ALRM023 | High water temperature during heating operation | Not stated | Yes |
| ALRM025 | Plant exchanger antifreeze cooling operation | Not stated | Yes |
| ALRM027 | Domestic hot water storage antifreeze during cooling operation | Not stated | Yes |
| ALRM028 | Plant exchanger and tank antifreeze during cooling operation | Not stated | Yes |
| E01 | High Pressure Protection | Not stated | Yes |
| E02 | Low Pressure Protection | Not stated | Yes |
| E03 | Water Flow switch Protection | Not stated | Yes |
| E04 | Electric Heater Overload Prot. | Not stated | Yes |
| E05 | Water Circuit Frost Protection | Not stated | Yes |
| E06 | Water In/Out Large Temp Diff Prot. | Not stated | Yes |
| E07 | Anti-freeze protection | Not stated | Yes |
| E07a | Overhigh Outlet Water Temperature after Electric Heater | Not stated | Yes |
| E08 | Communication Fault | Not stated | Yes |
| E08c | Communication Fault with Hydraulic Module | Not stated | Yes |
| E08g | Zone 1 Thermostat Communication Fault | Not stated | Yes |
| E08h | Zone 2 Thermostat Communication Fault | Not stated | Yes |
| E08i | Communication Fault with Indoor Unit | Not stated | Yes |
| E08j | Communication Fault with Consumption Module | Not stated | Yes |
| E09 | Winter frost protection (ambient temperature is too low) | Not stated | Yes |
| E10 | Discharge overheating three times protection | Not stated | Yes |
| E11 | Syst1: High Pressure Prot. | Not stated | Yes |
| E12 | Syst1: Low Pressure Prot. | Not stated | Yes |
| E19 | Primary Antifreezing Prot. In Winter | Not stated | Yes |
| E21 | Syst2: High Pressure Prot. | Not stated | Yes |
| E22 | Syst2: Low Pressure Prot. | Not stated | Yes |
| E29 | Secondary Antifreezing Prot. in Winter | Not stated | Yes |
| E030 | Insufficient Defrosting Water Flow Alarm | Not stated | Yes |
| E032 | Water Flow Switch Prot. | Not stated | Yes |
| E034 | Water Pressure Sensor Fault (for IDU) | Not stated | Yes |
| E035 | Low Water Flow Prot. | Not stated | Yes |
| E042 | DHW Electric Heater Overheat Fault | Not stated | Yes |
| E051 | Compressor Over current Shutdown Fault | Not stated | Yes |
| E065 | Water(Out) High Temp Prot. | Not stated | Yes |
| E071 | Water(Out) Low Temp Prot. | Not stated | Yes |
| E081 | DC Fan Board 1 Communication Fault | Not stated | Yes |
| E082 | DC Fan Board 2 Communication Fault | Not stated | Yes |
| E084 | The Wire Controller Does Not Match The Mainboard | Not stated | Yes |
| E103 | Fan 1 Thermal Overload Prot. | Not stated | Yes |
| E121 | Syst1: 4-Way Valve Abnormal Switch | Not stated | Yes |
| E122 | Abnormal Adjustment of Mixing Valve | Not stated | Yes |
| E131 | System 1 Refrigerant Leak Anomaly | Not stated | Yes |
| E171 | Syst1: Antifreezing Prot. | Not stated | Yes |
| E203 | Fan 2 Thermal Overload Prot. | Not stated | Yes |
| E221 | Syst2: 4-Way Valve Abnormal Switch | Not stated | Yes |
| E271 | Syst2: Antifreezing Prot. | Not stated | Yes |
| EE1 | Abnormal Power Fault | Not stated | Yes |
| Er01 | Phase dislocation | Not stated | Yes |
| Er02 | Phase loss | Not stated | Yes |
| Er03 | Water flow switch failure | Not stated | Yes |
| Er04 | Anti-freeze protection in winter | Not stated | Yes |
| Er05 | High pressure protection | Not stated | Yes |
| Er06 | Low pressure protection | Not stated | Yes |
| Er09 | Communication failure | Not stated | Yes |
| Er12 | High compressor exhaust gas temperature protection | Not stated | Yes |
| Er15 | Tank water temperature sensor failure | Not stated | Yes |
| Er16 | Coil temperature sensor failure | Not stated | Yes |
| Er18 | Compressor exhaust gas temp. sensor failure | Not stated | Yes |
| Er21 | Ambient temp sensor failure | Not stated | Yes |
| Er22 | Return water temp sensor failure | Not stated | Yes |
| Er23 | Low outlet water temperature protection under cooling mode | Not stated | Yes |
| Er25 | Water level switch failure | Not stated | Yes |
| Er27 | Outlet water temperature sensor failure | Not stated | Yes |
| Er29 | Compressor suction gas temperature sensor failure | Not stated | Yes |
| Er31 | Water pressure switch failure | Not stated | Yes |
| Er35 | Compressor high current protection | Not stated | Yes |
| Er44 | Low ambient temp protection | Not stated | Yes |
| Er45 | High outlet water temp protection under heat mode | Not stated | Yes |
| F00 | IPM Overcurrent Fault | Not stated | Yes |
| F01 | Compressor activation failure | Not stated | Yes |
| F03 | PFC Fault | Not stated | Yes |
| F05 | DC Bus Over voltage | Not stated | Yes |
| F06 | DC Bus Under voltage | Not stated | Yes |
| F07 | AC Input Under voltage | Not stated | Yes |
| F08 | AC Input Over current | Not stated | Yes |
| F09 | Input voltage sampling fault | Not stated | Yes |
| F10 | Communication Failure between DSP and PFC | Not stated | Yes |
| F11 | Communication Fault between DSP and Communication board | Not stated | Yes |
| F12 | Communication failure between PCB and driver board | Not stated | Yes |
| F13 | IPM Overheat Stop | Not stated | Yes |
| F14 | Compressor Lacking Phase Fault | Not stated | Yes |
| F15 | Input voltage Lacking Phase | Not stated | Yes |
| F16 | Compressor weak magnetic protection alarm | Not stated | Yes |
| F17 | Temperature fault of drive board | Not stated | Yes |
| F18 | IPM Current Sampling Fault | Not stated | Yes |
| F20 | IGBT Power Device Overheat Alarm | Not stated | Yes |
| F21 | Overspeed Fault | Not stated | Yes |
| F22 | AC input over current protection alarm | Not stated | Yes |
| F23 | EEPROM Fault Alarm | Not stated | Yes |
| F24 | Destroyed EEPROM Activation Ban Alarm | Not stated | Yes |
| F25 | LP 15V Under load Fault | Not stated | Yes |
| F26 | IGBT Power Device Overheat Fault | Not stated | Yes |
| F29 | EEPROM Fault | Not stated | Yes |
| F031 | DC Fan Motor 1 Failure | Not stated | Yes |
| F032 | DC Fan Motor 2 Failure | Not stated | Yes |
| F33 | Comp. Current Frequency Decrease Alarm | Not stated | Yes |
| F060 | Compressor Type Code Fault | Not stated | Yes |
| F101 | DC Fan 1 Phase Loss Prot. | Not stated | Yes |
| F102 | DC Fan 1 Zero Speed Prot. | Not stated | Yes |
| F103 | DC Fan 1 Start IPM Prot. | Not stated | Yes |
| F104 | DC Fan 1 Running IPM Prot. | Not stated | Yes |
| F105 | DC Fan 1 Overcurrent Prot. | Not stated | Yes |
| F106 | DC Fan 1 Over-Temp Prot. | Not stated | Yes |
| F107 | DC Fan 1 Bus Over Voltage Prot. | Not stated | Yes |
| F108 | DC Fan 1 Bus Under Voltage Prot. | Not stated | Yes |
| F109 | DC Fan Motor 1 Overspeed Protection | Not stated | Yes |
| F112 | DC Fan Motor 1 Current Sampling Fault | Not stated | Yes |
| F151 | Syst1: The Inverter Board Communication Fault | Not stated | Yes |
| F152 | Syst1: Comp. Start Fault | Not stated | Yes |
| F153 | Syst1: Comp. Start IPM Prot. | Not stated | Yes |
| F154 | Syst1: Comp. Running IPM Prot. | Not stated | Yes |
| F155 | Syst1: The Inverter Board IPM Over-Temp. Prot. | Not stated | Yes |
| F156 | Syst1: Comp. Overcurrent Prot. | Not stated | Yes |
| F157 | Syst1: The Inverter Board Bus Over Voltage Prot. | Not stated | Yes |
| F158 | Syst1: The Inverter Board Bus Under Voltage Prot. | Not stated | Yes |
| F201 | DC Fan 2 Output Phase Loss Prot. | Not stated | Yes |
| F202 | DC Fan 2 Output Zero Speed Prot. | Not stated | Yes |
| F203 | DC Fan 2 Start IPM Prot. | Not stated | Yes |
| F204 | DC Fan 2 Running IPM Prot. | Not stated | Yes |
| F205 | DC Fan 2 Overcurrent Prot. | Not stated | Yes |
| F206 | DC Fan 2 Over-Temp Prot. | Not stated | Yes |
| F207 | DC Fan 2 Bus Over Voltage Prot. | Not stated | Yes |
| F208 | DC Fan 2 Bus Under Voltage Prot. | Not stated | Yes |
| F209 | DC Fan Motor 2 Overspeed Protection | Not stated | Yes |
| F212 | DC Fan Motor 2 Current Sampling Fault | Not stated | Yes |
| F251 | Syst2: The Inverter Board Communication Fault | Not stated | Yes |
| F252 | Syst2: Comp. Start Fault | Not stated | Yes |
| F253 | Syst2: Comp. Start IPM Prot. | Not stated | Yes |
| F254 | Syst2: Comp. Running IPM Prot. | Not stated | Yes |
| F255 | Syst2: The Inverter Board IPM Over-Temp. Prot. | Not stated | Yes |
| F256 | Syst2: Comp. Overcurrent Prot. | Not stated | Yes |
| F257 | Syst2: The Inverter Board Bus Over Voltage Prot. | Not stated | Yes |
| F258 | Syst2: The Inverter Board Bus Under Voltage Prot. | Not stated | Yes |
| P01 | Water In Sensor Fault | Not stated | Yes |
| P02 | Water Out Sensor Fault | Not stated | Yes |
| P02a | Mix Tube Outlet Water Temp. Sensor Fault | Not stated | Yes |
| P03 | DHW Tank Sensor Fault | Not stated | Yes |
| P03a | Buffer Tank Temp. Sensor Fault | Not stated | Yes |
| P04 | AT Sensor Fault | Not stated | Yes |
| P05 | Coil temp. sensor failure (sensor is open or short circuit) | Not stated | Yes |
| P07 | Suction temp. sensor failure (sensor is open or short circuit) | Not stated | Yes |
| P09 | Anti-freeze temp. failure (the anti-freeze temp. sensor is open or short circuit) | Not stated | Yes |
| P013 | Heating Returning Water Temp. Sensor Fault | Not stated | Yes |
| P17 | Syst1: Suction Temp Sensor Fault | Not stated | Yes |
| P018 | DHW Returning Water Temp. Sensor Fault | Not stated | Yes |
| P023 | Heating Leaving Water Temp. Sensor Fault | Not stated | Yes |
| P27 | Syst2: Suction Temp Sensor Fault | Not stated | Yes |
| P028 | DHW Leaving Water Temp. Sensor Fault | Not stated | Yes |
| P032 | Hot Water Tank Temp. Sensor Fault | Not stated | Yes |
| P42 | Room Temp. Sensor Fault | Not stated | Yes |
| P81 | Discharge overheating protection | Not stated | Yes |
| P101 | Syst1: EVI(In) Temp Sensor Fault | Not stated | Yes |
| P102 | Syst1: EVI(Out) Temp Sensor Fault | Not stated | Yes |
| P105 | Zone 1 Room Temp. Sensor Fault | Not stated | Yes |
| P106 | Zone 2 Room Temp. Sensor Fault | Not stated | Yes |
| P107 | Zone 2 Mixing Temp. Sensor Fault | Not stated | Yes |
| P150 | Syst1: Coil Temp Sensor1 Fault | Not stated | Yes |
| P152 | Syst1: Coil(Out) Temp Sensor Fault | Not stated | Yes |
| P153 | Coil Temp. Sensor Fault | Not stated | Yes |
| P154 | Syst1: Coil Temp Sensor2 Fault | Not stated | Yes |
| P181 | Syst1: Exhaust Air Temp Sensor Fault | Not stated | Yes |
| P182 | Syst1: Exhaust Air High Temp Prot. | Not stated | Yes |
| P191 | Syst1: Antifreezing 1 Sensor Fault | Not stated | Yes |
| P201 | Syst2: EVI(In) Temp Sensor Fault | Not stated | Yes |
| P202 | Syst2: EVI(Out) Temp Sensor Fault | Not stated | Yes |
| P250 | Syst2: Coil Temp Sensor1 Fault | Not stated | Yes |
| P252 | Syst2: Coil(Out) Temp Sensor Fault | Not stated | Yes |
| P254 | Syst2: Coil Temp Sensor2 Fault | Not stated | Yes |
| P281 | Syst2: Exhaust Air Temp Sensor Fault | Not stated | Yes |
| P282 | Syst2: Exhaust Air High Temp Prot. | Not stated | Yes |
| P291 | Syst2: Antifreezing 1 Sensor Fault | Not stated | Yes |
| Pp1 | Exhaust Pressure Sensor Fault | Not stated | Yes |
| Pp2 | Suction Pressure Sensor Fault | Not stated | Yes |
| PP11 | Syst1: Low Pressure Sensor Fault | Not stated | Yes |
| PP12 | Syst1: High Pressure Sensor Fault | Not stated | Yes |
| PP21 | Syst2: Low Pressure Sensor Fault | Not stated | Yes |
| PP22 | Syst2: High Pressure Sensor Fault | Not stated | Yes |
| T5S | Cooling Not Allowed Due to Large Temperature Difference Between Indoor and Outdoor Temperature | Not stated | Yes |
| T5T | Temperature & Humidity Sensor Fault | Not stated | Yes |
| T5Z | External Ambient Temperature Sensor Fault | Not stated | Yes |
| TC | No Cooling at Low AT Protection | Not stated | Yes |
| TP | Low AT Power-Off Prot. | Not stated | Yes |