Refer to Service Manual for details Fault codes

To retrieve fault codes from the remote controller Press the ‘CHECK’ button for approximately ½ second Fault codes To clear fault codes from the remote controller Press the ‘CHECK’ button and hold for approximately 15 seconds

To retrieve fault codes from the outdoor unit interface PCB Set SW01, SW02 & SW03 to ‘1’ Fault codes UI - - Outdoor unit no. Fault code (‘- -’ = no fault)

Code 0b Cause Float switch operation Float switch open circuit > 2 minutes Fault codes

Code 04 Cause No communication between inverter and interface PCB Fault codes

Code 08 Cause TS & TE sensors detect wrong change in temperature during heating operation > 5ºC after 5 minutes Fault codes

Code 11 Cause Indoor fan motor alarm Fan motor circuit connection fault Capacitor fault Fan motor fault Indoor PCB fault Fault codes

Code CF Cause No communication between fan motor PCB and main PCB at indoor unit. Fault codes

Code 14 Cause G-Tr short circuit protection Outdoor unit power source errorWiring error on inverter PCB AC fuse disconnectionInverter compressor fault Inverter PCB fault Fault codes

Code 17 Cause Inverter compressor DC current detected during off cycle Fault codes

Code 1d Cause Overload protection (if measured by DC sensor four times) Inverter compressor overload current Fault codes

Code 1F Cause High motor current (if measured by DC sensor four times) Excessive current detected after high current release Fault codes

Code 21 Cause Inverter compressor high pressure switch operation Pressure sensor >363 psig Fault codes

Code 22 Cause High pressure Pressure sensor > 406 psig Fault codes

Code 87 Cause Missing phase Missing phase on outdoor unit power supply Fault codes

Code 89 Cause Indoor units over capacity No. of connected indoor units over capacity Incorrect set-up of indoor unit capacity Fault codes

Code 8d Cause Reduction in the number of connected outdoor units Outdoor unit system set-upOutdoor unit power source Comms. cable error between o/d unitsBUS communication error Interface PCB fault Fault codes

Code 8F Cause Duplicated terminal outdoor addresses Address set-up of outdoor unit duplicated Interface PCB error Fault codes

Code 93 Cause Indoor unit TC1 sensor fault Fault codes

Code 94 Cause Indoor unit TC2 sensor fault Fault codes

Code 95 Cause Communication error between indoor/outdoor units PQ connection error between indoor/outdoor units Connection error at indoor PCB Outdoor interface PCB error Fault codes

Code 96 Cause PQ connection error between indoor/outdoor units Incorrect number of indoor units Wiring connection error on central controller Fault codes

Code 97 Cause BUS communication alarm Connection error in XY network No outdoor communication received by central controller Number of indoor units has fallen since last set-up Fault codes

Code 98 Cause BUS communication alarm Duplicated network addresses Miswiring of XY communication cables Indoor PCB/central controller error Fault codes

Code 99 Cause Remote controller alarm Duplicated No. 1 indoor unit Miswiring of remote controller cables Remote controller error Indoor PCB error Fault codes

Code 9A Cause Unauthorised temperature change Used during self-check function TC1 detects temperature change >5ºC during off cycle Fault codes

Code 9F Cause Insufficient change in indoor coil temperature TC1 and TC2 do not fall more than 4ºC below TA sensor Indoor PMV connection error Fault codes

Code A0 Cause TD1 sensor open/short circuit Misconnection at CN502 Fault codes

Code A1 Cause TD2 sensor open/short circuit Misconnection at CN503 Fault codes

Code A2 Cause TS1 sensor open/short circuit Misconnection at CN504 Fault codes

Code A6 Cause High discharge temperature Sensor TD1 detects > 130ºC three times Cooling bypass PMV error Fault codes

Code A7 Cause High suction temperature Sensor Ts detects > 60ºC for 10 minutes - three times Fault codes

Code AA Cause Pd pressure sensor alarm Connection error at CN501 Interface PCB error Fault codes

Code Ab Cause Misconnection of Pd/Ps pressure sensors Pd/Ps sensor error Compressor inverse operation Fault codes

Code AE Cause High discharge temperature at low load Sensor TD1 detects > 110ºC three times Fault codes

Code AF Cause Phase rotation incorrect or incomplete Fault codes

Code b4 Cause Ps sensor alarm Ps sensor error Ps sensor connection error Compressor error Fault codes

Code b5 Cause External alarm circuit Notified by resistive connection(10K ohms) to CN17 on indoor unit PCB Fault codes

Code b6 Cause External stop circuit Notified by short circuit across CN17 on indoor unit PCB (Repeated as Eb code at outdoor unit) Fault codes

Code Eb Cause External stop circuit Notified by short circuit across CN17 on indoor unit PCB (Repeated as b6 code at indoor unit) Fault codes

Code b7 Cause Fault in networked slave unit Code available at central controller when slave units in group have fault code (Full code available at local remote controller and inverter outdoor unit) Fault codes

Code b9 Cause Indoor pressure sensor alarm Output voltage error Fault codes

Code bb Cause High discharge temperature Sensor TD2 detects > 130ºC three times Fault codes

Code bd Cause Inverter unit - DOL compressor operation detected during off cycle Pd & Ps pressure sensors Discharge temperature sensors Fault codes

Code bE Cause Low pressure Suction pressure < 3 psig Fault codes

Code d1 Cause Master outdoor unit set-up alarm No. of connected inverter units incoorect Incorrect set-up of master outdoor unit Outdoor unit interface PCB fault Fault codes

Code d2 Cause Defective slave outdoor unit Fault codes

Code d3 Cause TH sensor alarm (IGBT) Fault codes

Code d4 Cause TK1 sensor alarm TK1 sensor open/short circuit Faulty connection at CN516 Interface PCB fault Fault codes

Code d5 Cause TK2 sensor alarm TK2 sensor open/short circuit Faulty connection at CN515 Interface PCB fault Fault codes

Code d6 Cause TK3 sensor alarm TK3 sensor open/short circuit Faulty connection at CN507 Interface PCB fault Fault codes

Code d7 Cause Oil level low Measured by TK1, TK2 and TK3 Fault codes

Code d8 Cause No oil flow during management process Measured by TK1 primary side No temperature change Fault codes

Code d9 Cause No oil flow during management process Measured by TK2 secondary side No temperature change Fault codes

Code dA Cause Inverter heat sink TH IGBT sensor too hot Fault codes

Code db Cause No oil flow during management process Measured by TK1 and TK2 No temperature change Fault codes

Code dC Cause Oil temperature too high Measured by TK1 primary side at > 50ºC Fault codes

Code dd Cause Fixed speed unit - compressor operation detected during off cycle PD & PS pressure sensors Discharge temperature sensors Fault codes

Code dE Cause Indoor address undefined Incorrect set-up of indoor PCB Defective indoor PCB Communication noise interference Fault codes

Code dF Cause Outdoor address undefined Defective interface PCB Communication noise interference Fault codes

Code E1 Cause DOL compressor high pressure switch #1 Pressure sensor > 363 psig Fault codes

Code F0 Cause DOL compressor high pressure switch #2 Pressure sensor > 363 psig Fault codes

Code E5 Cause Inverter compressor klixon Pressure sensor <363 psig Fault codes

Code E6 Cause DOL compressor klixon #1 or overload relay (manual reset) Pressure sensor < 363 psig Fault codes