R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Comms fault between boards - check inverter error detail for which 2 boards, check transformer, bus voltage and inter-connecting cables
FAULT CODE = 900
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = Lossnay unit in test run
FAULT CODE = 1102
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = High compressor discharge temperature. Discharge temperature has exceeded 110°C or more. Short of refrigerant. Discharge thermistor
FAULT CODE = 1111
R22 = x
R407c = x
R410A = -
LOSSNAY = -
DESCRIPTION = Low pressure/temperature fault - check thermistors (TH2, TH3, TH4), gas charge, indoor fan, heat exchanger and filter
FAULT CODE = 1112
R22 = x
R407c = x
R410A = -
LOSSNAY = -
DESCRIPTION = Low pressure/temperature fault - check thermistors (TH2, TH3, TH4), gas charge, indoor fan, heat exchanger and filter
FAULT CODE = 1113
R22 = x
R407c = x
R410A = -
LOSSNAY = -
DESCRIPTION = Low pressure/temperature fault - check thermistors (TH2, TH3, TH4), gas charge, indoor fan, heat exchanger and filter
FAULT CODE = 1202
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Preliminary fault to 1102
FAULT CODE = 1204
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = Preliminary heat exchanger gas temperature sensor fault - check thermistors 10a and 10b
FAULT CODE = 1205
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Preliminary thermistor fault (TH5)
FAULT CODE = 1211
R22 = x
R407c = x
R410A = -
LOSSNAY = -
DESCRIPTION = Preliminary thermistor fault (TH2)
FAULT CODE = 1214
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Preliminary thermistor fault (THHS)
FAULT CODE = 1216
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Preliminary thermistor fault (TH7)
FAULT CODE = 1217
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Preliminary thermistor fault (TH8)
FAULT CODE = 1219
R22 = x
R407c = x
R410A = -
LOSSNAY = -
DESCRIPTION = Preliminary thermistor fault (TH9)
FAULT CODE = 1221
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Preliminary thermistor fault (TH6)
FAULT CODE = 1243
R22 = -
R407c = x
R410A = -
LOSSNAY = -
DESCRIPTION = Preliminary thermistor fault (TH10)
FAULT CODE = 1301
R22 = -
R407c = x
R410A = -
LOSSNAY = -
DESCRIPTION = Low pressure fault (63L operation) low pressure sensor sensing less than 1 bar immediately before starting
FAULT CODE = 1302
R22 = x
R407c = x
R410A = -
LOSSNAY = -
DESCRIPTION = High pressure fault - check pressure in system for more than 29 bar (R407c) 38 bar (R410A). Check high pressure sensor against gauge pressure
FAULT CODE = 1368
R22 = x
R407c = x
R410A = -
LOSSNAY = -
DESCRIPTION = Pressure sensor fault (PS1) at BC - compare pressure reading on SW1 on O/C
FAULT CODE = 1370
R22 = x
R407c = x
R410A = -
LOSSNAY = -
DESCRIPTION = Pressure sensor fault (PS3) at BC - compare pressure reading on SW1 at O/C
FAULT CODE = 1402
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = Preliminary fault to 1302
FAULT CODE = 1500
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = System overcharge. Abnormal low compressor superheat - discharge thermistor TH4
FAULT CODE = 1501
R22 = x
R407c = x
R410A = -
LOSSNAY = -
DESCRIPTION = High compressor shell temp - check for shortage of gas, insufficient indoor index running (comms room units)
FAULT CODE = 1505
R22 = x
R407c = x
R410A = -
LOSSNAY = -
DESCRIPTION = Suction pressure abnormal - generated by low pressure sensor detecting a vacuum - check for blockage, closed valve or sensor fault
FAULT CODE = 2500
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Detecting lack of water flow on a water circuit
FAULT CODE = 2502
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = I/C has water level in drip tray, when the unit was running in cooling (temperature sensors - check for open or closed circuit and operation of pump)
FAULT CODE = 2503
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = I/C has water level in drip tray when the unit was running in cooling (float sensor - check for closed circuit on float switch and operation of pump)
FAULT CODE = 2600
R22 = x
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = Water leak from humidifier
FAULT CODE = 4100
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = Compressor over current protection on Mr Slim with M-net interface - check inverter or compressor
FAULT CODE = 4101
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = Compressor over current protection on Mr Slim with M-net interface - check inverter or compressor
FAULT CODE = 4102
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = Open phase fault - check power supply and noise filter for loss of phase, check wiring and fuses
FAULT CODE = 4103
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Reverse phase fault - check phase rotation, loss of phase through the noise filter, fuse blown and high pressure switch open at power on
FAULT CODE = 4106
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = Transmission power supply fault - check wiring, high current, incorrect voltage on transmission line and/or M-Net board
FAULT CODE = 4108
R22 = -
R407c = x
R410A = -
LOSSNAY = -
DESCRIPTION = Over current protection on DOL compressor - check power supply, contactor and compressor
FAULT CODE = 4115
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Power supply abnormal - check power, fuses, connections and PCB
FAULT CODE = 4116
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Fan motor abnormal - check fan motor and board (relates to indoor unit or Lossnay unit)
FAULT CODE = 4124
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = Thermal switch (49C) open circuit on Mr Slim on M-Net - reset and check pressures and air flow
FAULT CODE = 4210
R22 = x
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = Compressor over current problem - check inverter balance. Compressor and inverter
FAULT CODE = 4220
R22 = -
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Low inverter board BUS voltage. Less than 289VdcDC is detected. - check mains supply
FAULT CODE = 4225
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = Low DC voltage on Vdc on fan inverter - check CNVdc for 300Vdc on diode stack and check mains power supply to outdoor unit
FAULT CODE = 4230
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = High temperature on heat sink on inverter - check for blockages in air duct, failure of INV fan or failure of thermistor
FAULT CODE = 4235
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = Fan inverter heat sink overheat protection. Reduced airflow through heat sink. Fan motor problem. THHS thermistor problem.
FAULT CODE = 4240
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Over current protection. If high current is detected for more than 10 minutes - check inverter balance. Reduced airflow through heat sink
FAULT CODE = 4245
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = Over current protection. Possible ACCT current sensor fault. Should read 280 ohms between pins 1 & 2 and across pins 3 & 4
FAULT CODE = 4250
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = Over current protection. Inverter IPM problem. Compressor lock - check inverter balance
FAULT CODE = 4255
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = Inverter cooling fan problem - if high static fan is used then check that SW3-9 is on
FAULT CODE = 4260
R22 = -
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Preliminary inverter heat sink overheat protection. Reduced airflow through heat sink. Fan motor problem. THHS thermistor problem.
FAULT CODE = 5101
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Thermistor fault at indoor/outdoor unit - check fault code address
FAULT CODE = 5102
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Thermistor fault at indoor/outdoor unit - check fault code address
FAULT CODE = 5103
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Thermistor fault at indoor/outdoor unit - check fault code address
FAULT CODE = 5104
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Thermistor fault at indoor/outdoor unit - check fault code address (indoor fault - check SW7-3 is off)
FAULT CODE = 5105
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = TH5 open/short circuit - check if the TH is disconnected from the board
FAULT CODE = 5106
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = TH5 open/short circuit - check if the TH is disconnected from the board
FAULT CODE = 5107
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = TH7 open/short circuit - check if the TH is disconnected from the board
FAULT CODE = 5108
R22 = x
R407c = x
R410A = -
LOSSNAY = -
DESCRIPTION = TH8 open/short circuit - check if the TH is disconnected from the board
FAULT CODE = 5109
R22 = -
R407c = x
R410A = -
LOSSNAY = -
DESCRIPTION = TH9 open/short circuit - check if the TH is disconnected from the board
FAULT CODE = 5110
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = TH10 open/short circuit - check if the TH is disconnected from the board
FAULT CODE = 5111
R22 = x
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = BC box thermistor error - TH11 open/short circuit, disconnected from board/pipe
FAULT CODE = 5112
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = BC box thermistor error - TH10 open/short circuit, disconnected from board/pipe
FAULT CODE = 5113
R22 = x
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = BC box thermistor error - TH open/short circuit, disconnected from board/pipe
FAULT CODE = 5114
R22 = x
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = BC box thermistor error - TH open/short circuit, disconnected from board/pipe
FAULT CODE = 5115
R22 = x
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = BC box thermistor error - TH15 open/short circuit, disconnected from board/pipe
FAULT CODE = 5116
R22 = x
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = BC box thermistor error - TH16 open/short circuit, disconnected from board/pipe
FAULT CODE = 5201
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Pressure sensor fault outdoor unit/BC box - check fault code address/SW1 pressure sensor readings
FAULT CODE = 5202
R22 = x
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = Pressure sensor fault (PS2) in the BC box
FAULT CODE = 5203
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Pressure sensor fault (PS3) in the BC box
FAULT CODE = 5300
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = A-Control UH fault - see Mr Slim fault code list
FAULT CODE = 5301
R22 = -
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Current sensor fault, ACCT or DCCT - check inv. error details
FAULT CODE = 5401
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = Temperature sensor fault - check CN30 for humidity sensor
FAULT CODE = 5701
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = Loose float switch connector - check switch, check CN4F on indoor unit
FAULT CODE = 6201
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = TB7 transmission line communication error - check for voltage abnormality/short
FAULT CODE = 6202
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = Transmission processor hardware error - check for noise/short on M-Net cable
FAULT CODE = 6600
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Repeat address fault - two or more units are assigned the same address - correct the repeated address
FAULT CODE = 6601
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = Polarity setting error - no voltage or short circuit on the m-net transmission line
FAULT CODE = 6602
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Hardware error of transmission processor. Noise interference. Polarity problem on TB7
FAULT CODE =
R22 =
R407c
R410A =
LOSSNAY = -
DESCRIPTION =
FAULT CODE = 6603
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Bus circuit busy - check if indoor unit, Lossnay unit or anything else has been wired into TB7, instead of TB3
FAULT CODE = 6607
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Communication issue - no response back from unit whilst system is operational
FAULT CODE = 6608
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Communication error - loss of voltage or noise entering the transmission line
FAULT CODE = 6700
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = K control communication error - R22 type unit connected onto M-Net circuit comms error
FAULT CODE = 6701
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = K control communication error - R22 type unit connected onto M-Net circuit comms error
FAULT CODE = 6702
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = K control duplicate address error - two or more R22 type units connected onto M-Net circuit with the same address
FAULT CODE = 6750
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = K control communication error - R22 type unit connected onto M-Net circuit comms error
FAULT CODE = 6751
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = R22 R/A thermistor fault (P1)
FAULT CODE = 6752
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = R22 frost protection at I/C (P6)
FAULT CODE = 6753
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = Comms fault between O/C and I/C
FAULT CODE = 6754
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = R22 drain fault (P5)
FAULT CODE = 6755
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = R22 drain fault (P5)
FAULT CODE = 6756
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = R22 frost protection at I/C (P6)
FAULT CODE = 6757
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = System error
FAULT CODE = 6758
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = Comms fault between I/C and O/C
FAULT CODE = 6761
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = R22 R/A thermistor fault (P1)
FAULT CODE = 6762
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = R22 TH2 fault check resistance (P2)
FAULT CODE = 6763
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = R22 Comms fault between I/C and O/C
FAULT CODE = 6764
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = R22 drain fault (P4)
FAULT CODE = 6765
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = R22 drain fault (P5)
FAULT CODE = 6766
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = R22 frost protection at I/C (P6)
FAULT CODE = 6767
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = R22 comms fault between I/C and O/C
FAULT CODE = 6771
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = K abnormality - high pressure abnormality or low pressure abnormality
FAULT CODE = 6772
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = K abnormality - inner thermostat function, discharge temperature abnormality, shell thermostat function, over current protection
FAULT CODE = 6773
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = K abnormality - radiator plate thermostat function
FAULT CODE = 6774
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = K abnormality - outdoor thermistor abnormality
FAULT CODE = 6775
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = K abnormality - pressure sensor abnormality, indoor/outdoor communication error
FAULT CODE = 6776
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = K abnormality - over current shut-off
FAULT CODE = 6777
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = K abnormality - system error
FAULT CODE = 6778
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = K abnormality - normal
FAULT CODE = 6779
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = K abnormality - refrigerant overcharge, abnormal voltage, abnormal CT sensor
FAULT CODE = 6830
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = Comms fault between I/C and R/C check connections to MA R/C and check for 12Vdc check R/C not set sub controller
FAULT CODE = 6831
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = MA R/C communication fault - check connections on TB15 or that the controller was removed while the I/C was powered
FAULT CODE = 6832
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = MA controller comms fault - check cable length no bigger than 500m, check connection and type of cable used, check R/C not set sub on field settings
FAULT CODE = 6833
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = MA controller comms fault check cable length no bigger than 500m, check connection and type of cable used, check R/C not set sub on field settings
FAULT CODE = 6834
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = MA Controller comms fault - check cable length no bigger than 500m, check connection and type of cable used, check R/C not set sub on field settings
FAULT CODE = 6840
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = A-Control E6/E8 fault - see Mr Slim fault code list
FAULT CODE = 6841
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = A-Control E7/E9 fault - see Mr Slim fault code list
FAULT CODE = 6844
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = A-Control EA fault - see Mr Slim fault code list
FAULT CODE = 6845
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = A-Control Eb fault - see Mr Slim fault code list
FAULT CODE = 6846
R22 = -
R407c = -
R410A = -
LOSSNAY = -
DESCRIPTION = A-Control EC fault - see Mr Slim fault code list
FAULT CODE = 7100
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Over capacity - (R2 150% index exceeded) (Y 130% index exceeded)
FAULT CODE = 7101
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Capacity setting error - SW2 set wrong on indoors, SW5 on YHMA outdoor, (SW3-10 on older kit)
FAULT CODE = 7102
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Error in number of connected units - loss of M-Net voltage (short or break), no power to BC, wrong SW5 setting on box, wrong box type
FAULT CODE = 7105
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Address setting error - OC or BC addressed wrong
FAULT CODE = 7106
R22 = -
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Attribute setting error - SW3-1 setting on a GUF
FAULT CODE = 7107
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Port setting error - check if too much capacity on a single port, wiring SW2 setting, wrong SW14 setting or wrong units on a box when using multiple boxes
FAULT CODE = 7110
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = Check SW5-7 is correctly set
FAULT CODE = 7111
R22 = x
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Remote control sensor fault - SW1 - 1 on and no controllers fitted or faulty remote controller
FAULT CODE = 7113
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = Function setting error - wrong SW5 setting or wrong resistors fitted on YHM-A
FAULT CODE = 7117
R22 = -
R407c = -
R410A = x
LOSSNAY = -
DESCRIPTION = Model setting error - SW5 set wrong or wrong resistors in
FAULT CODE = 7130
R22 = -
R407c = x
R410A = x
LOSSNAY = -
DESCRIPTION = Incompatible equipment on M-Net - check split with MAC 399 wired onto the TB5 line TB5 line, not the TB7
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