E:11 communication split flow - ARTG24/30/36LHTDP duct

3 wire remote controller communication check flow

E:64 active filter / PFC voltage error flow

E:65 IPM / trip terminal L error flow

E:94 over current / trip detection flow

E:95 compressor control error flow

E:A1 discharge temperature / E:A3 compressor temperature flow

E:A5 low pressure error flow

1. Confirm caller name, company, site address, indoor model/serial and outdoor model/serial.
2. Confirm exact complaint: error code, operating mode, when it occurs and whether it is repeatable.
3. Confirm safety: no burning smell, water ingress, damaged wiring, repeated breaker trips or refrigerant odour.
4. Confirm tools: multimeter with AC/DC volts, resistance and diode test.
5. If caller is not qualified or cannot identify terminals safely, stop at non-invasive checks and arrange authorised attendance.

1. Reset power and confirm if E:11 returns.
2. Check external causes such as poor earth, noise or equipment causing harmonic wave near power cable.
3. Check interconnect and control unit connections for loose connector, open cable or mis-wiring.
4. Check outdoor supply: expected AC198-264 V at outdoor terminal L-N.
5. Reverse transfer signal: outdoor terminal 1-3 expected AC90-270 V.
6. Forward transfer signal: outdoor terminal 2-3 expected AC30-130 V.
7. For reverse abnormal: check outdoor fan motor. ARTG30/36 also check active filter, transistor PCB/IPM and filter PCB CN110.
8. For forward abnormal: replace controller PCB after wiring, supply and noise are proven.

1. Confirm Y1 = 12 V/red, Y2 = signal/white, Y3 = COM/black.
2. Measure Y1 to Y3: expected 12 VDC, no less than 11.4 VDC.
3. CN14 terminal 1-3 is remote power supply; manual reference is DC13 V.
4. Remove Y2 from remote. Measure remote Y2 to Y3: expected fluctuating 7-11 / 7-12 VDC pulse.
5. Measure disconnected Y2 wire going to indoor unit to Y3: expected fluctuating 7-11 / 7-12 VDC pulse.
6. If no 12 V supply, check indoor PCB remote power supply. If remote has supply but no Y2 pulse, suspect remote. If field Y2 has no return pulse, check cable and indoor PCB.

1. Check connector is not loose, removed, miswired or open.
2. Disconnect thermistor and measure resistance out of circuit. Compare to actual bulb temperature.
3. Indoor room thermistor rough values: 0C 33.6 kΩ, 5C 25.9 kΩ, 10C 20.2 kΩ, 15C 15.8 kΩ, 20C 12.5 kΩ, 25C 10.0 kΩ, 30C 8.0 kΩ, 35C 6.5 kΩ, 40C 5.3 kΩ, 45C 4.35 kΩ, 50C 3.59 kΩ.
4. Indoor heat exchanger thermistor rough values: 0C 176 kΩ, 5C 134 kΩ, 10C 103 kΩ, 15C 80.3 kΩ, 20C 62.9 kΩ, 25C 49.7 kΩ, 30C 39.6 kΩ, 35C 31.7 kΩ, 40C 25.6 kΩ, 45C 20.8 kΩ, 50C 17.1 kΩ.
5. Outdoor 5 V checks: AOTG24 discharge CN71:3-4, compressor CN73:1-3, heat exchanger CN71:1-2, outdoor CN70:1-3. AOTG30/36 discharge CN63:1-3, compressor CN64:1-3, heat exchanger CN65:1-3, outdoor CN62:1-3.
6. With thermistor removed, PCB supply should be DC5.0 V.

1. Power off. Rotate fan by hand and check obstruction, bearing lock, dropped fan or casing contact.
2. Check ambient temperature around the motor.
3. Circuit-test between Vm and GND. If short-circuited below 300 kΩ, replace indoor fan motor and relevant controller/power PCB.
4. For E:15 automatic airflow adjustment, confirm fan reaches target speed within 2 minutes and no input power abnormality is detected.
5. Record fan rotation, motor reading, connector condition and PCB decision.

1. Power off. Rotate fan by hand and check obstruction, bearing lock, fan guard contact or damaged fan.
2. Check ambient temperature around the motor.
3. Circuit-test between Vm and GND. If short-circuited below 300 kΩ, replace outdoor fan motor and main PCB where required.
4. Output reference from component training: Red-Black 240-400 VDC and White-Black 15 VDC ±1.5 V where applicable.
5. On E:11 reverse faults, abnormal outdoor fan motor can load the signal path.

1. Check EEV connector for loose connector or open cable.
2. Common coil check: Yellow-Red, Orange-Red, Blue-Red, White-Red = 46 Ω ±4 Ω at 20C.
3. Remove connector and check PCB drive voltage: expected DC12 V.
4. Turn on power and listen/feel for EEV start-up operation noise.
5. Check opening/closing effect by temperature difference. Closed valve creates inlet/outlet temperature difference; open valve has no temperature difference.
6. A temperature difference across strainer suggests clogging.

1. Check compressor terminal connection and main PCB / transistor PCB connection for loose or incorrect wiring.
2. Check winding resistance between U-V, V-W and U-W and record all three values. Treat 0 Ω, infinity or imbalance as abnormal.
3. If compressor does not start or stops soon, check gas pipe valve open, refrigerant leak, strainer clogging and harness condition.
4. Follow manual sequence for PCB / transistor PCB and then compressor.

1. Use for ARTG30/36 E:64 active filter voltage error and E:11 reverse transfer abnormal signal follow-on.
2. Check voltage drop, momentary power failure, defective contact, noise and grounding.
3. Check connector condition: removed connector, erroneous connection or open cable.
4. Check active filter module using service parts method. If abnormal, replace active filter.
5. If active filter is normal, continue to transistor PCB/IPM then main PCB.

1. Use for ARTG30/36 E:63, E:64, E:65, E:94 and E:95.
2. Confirm L-N supply is within range before board approval.
3. Inspect transistor PCB connections and harnesses for loose connectors, corrosion, open cable or burn marks.
4. Check compressor winding and outdoor fan motor loading before recommending transistor PCB.
5. Attach photos and readings to ticket before approval.

1. Check pressure sensor or high pressure switch connector and wiring condition.
2. High pressure switch reference: contact changes at approximately 4.2 ±0.1 MPa and returns at approximately 3.2 ±0.15 MPa.
3. For A5, check valve position, ambient, outdoor fan, EEV/strainer and refrigerant amount before sensor or PCB replacement.
4. Record pressure, mode, pipe temperatures, sensor/switch reading and refrigerant evidence.

1. Check float switch operation and any blockage by dust.
2. Remove float switch and check ON/OFF switching operation by meter.
3. Check CN9 and shorted / pinched wire.
4. Check drain hose for clogging, traps or poor fall.
5. If checks are normal and drainage error remains, controller PCB becomes suspect.

1. Check model combination: indoor and outdoor unit must be correct.
2. Check RC group wiring and remote address setting.
3. Check mixed automatic and manual address settings in one RC group.
4. Check duplicated remote controller address in one RC group.
5. Correct settings, reset power and retest before PCB approval.

1. Check connection between controller PCB and external I/O PCB.
2. Check connector condition on external I/O PCB and controller PCB.
3. If connection is normal and fault remains, replace external I/O PCB first.
4. If condition does not change after external I/O PCB, replace controller PCB.

1. Reset power and confirm if E:32 returns.
2. Check all indoor electrical connectors for loose connector or incorrect wiring.
3. Check PCB for shortage, corrosion or water damage.
4. Check external cause such as poor earth or harmonic noise near power cable.
5. If checks do not improve symptom, replace controller PCB.

1. Reset power and confirm if E:62 returns.
2. Check temporary voltage drop, momentary open circuit and grounding.
3. Check there are no related control cables routed near power line causing noise.
4. If checks do not improve symptom, replace outdoor main PCB.

1. Check connector is fitted, not miswired and no open cable.
2. Check relevant thermistors are fitted in holders and not pinched or reading incorrectly.
3. Check solenoid coil / valve operation where accessible.
4. Check valve position by piping temperature difference.
5. If checks pass and error remains, board control becomes suspect.

1. Reset power and confirm if E:84 returns.
2. Check external causes: voltage drop, momentary open circuit, noise and grounding.
3. Check outdoor connectors, terminal tightness, miswiring and open cables.
4. ARTG24: main PCB suspect if checks do not improve. ARTG30/36: filter PCB first, then main PCB if symptom remains.