SiE 00-07Table of Contents iii3.15 Outdoor Unit: Actuation of High Pressure Switch................................ 1373.16 Outdoor Unit: Actuation of Low Pressure Sensor................................ 1383.17 Outdoor Unit: Malfunction ofMoving Part of Electronic Expansion Valve (Y1E)............................... 1393.18 Outdoor Unit: Abnormal Discharge Pipe Temperature........................ 1403.19 Outdoor Unit: Malfunction of Thermistor for Outdoor Air (R1T)........... 1413.20 Outdoor Unit: Malfunction of Discharge Pipe Thermistor (R3T) .......... 1423.21 Outdoor Unit: Malfunction of Thermistor (R4T) for Suction Pipe ......... 1433.22 Outdoor Unit: Malfunction of Thermistor (R2T) for Heat Exchanger ... 1443.23 Outdoor Unit: Malfunction of Discharge Pipe Pressure Sensor........... 1453.24 Outdoor Unit: Malfunction of Suction Pipe Pressure Sensor............... 1463.25 Low Pressure Drop Due to Refrigerant Shortageor Electronic Expansion Valve Failure................................................. 1473.26 Reverse Phase, Open Phase .............................................................. 1483.27 Malfunction of TransmissionBetween Indoor Units .......................................................................... 1493.28 Malfunction of TransmissionBetween Remote Controller and Indoor Unit....................................... 1503.29 Malfunction of TransmissionBetween Outdoor Units ....................................................................... 1513.30 Malfunction of TransmissionBetween Master and Slave Remote Controllers.................................. 1523.31 Malfunction of TransmissionBetween Indoor and Outdoor Units in the Same System .................... 1533.32 Excessive Number of Indoor Units ...................................................... 1543.33 Address Duplication of Central Remote Controller.............................. 1553.34 Refrigerant System not Set, Incompatible Wiring/Piping..................... 1553.35 Malfunction of System, Refrigerant System Address Undefined......... 1564. Failure Diagnosis for Inverter System........................................................... 1574.1 Points of Diagnosis.............................................................................. 1574.2 How to Use The Monitor Switch on The Inverter PC Board ................ 1585. Troubleshooting (Inverter)...................................................................1595.1 Outdoor Unit: Malfunction ofInverter Radiating Fin Temperature Rise ............................................ 1595.2 Outdoor Unit: Inverter Instantaneous Over-Current ............................ 1605.3 Outdoor Unit: Inverter Thermostat Sensor, Compressor Overload ..... 1615.4 Outdoor Unit: Inverter Stall Prevention, Compressor Lock.................. 1625.5 Outdor Unit: Malfunction of TransmissionBetween Inverter and Control PC Board ............................................. 1635.6 Power Supply Insufficient or Instantaneous Failure ............................ 1645.7 Outdoor Unit: Inverter Over-Ripple Protection..................................... 1655.8 Outdoor Unit: Malfunction ofInverter Radiating Fin Temperature Rise Sensor ................................ 1666. Troubleshooting (OP: Central Remote Controller) ..............................1676.1 Malfunction of TransmissionBetween Central Remote Controller and Indoor Unit .......................... 1676.2 PC Board Defect.................................................................................. 1686.3 Malfunction of TransmissionBetween Optional Controllers for Centralized Control......................... 1686.4 Improper Combination of Optional Controllersfor Centralized Control......................................................................... 1696.5 Address Duplication, Improper Setting ................................................ 170
