Daikin

Setting Indoor Group Address

Indoor Group Address is required for proper CoolMasterNet operation. Without Group Address Indoor unit is not visible and can not be controlled by CoolMasterNet. Group Address is set with wired remote controller. Here is a simple sequence of operations for Daikin BRCE61 wired remote controller to set Group Address.

• Press and hold Cancel button for a few seconds
  

• Scroll down to Group No. setting function and press Menu/Enter button
  

• Program Group Address and then press Menu/Enter to save address
  

Remember if Indoor unit can not see a CoolMasterNet you won't have the Group Address menu option. So make sure the CoolMasterNet is wired to F1 F2 HVAC line and powered.

Reading Thermostat ambient temperature instead of return air

CoolMasterNet will read ambient temperature measured by Thermostat - local wired controller (like BRC1E72) if following field settings had being done on Thermostat:
Setting 10-2 = 03 - Only the thermostat thermistor will be utilized by Indoor unit.
Setting 10-5 = 02 - Room temperature value reported to CoolMasterNet by Indoor is taken from Thermostat

KRP928A2S Auto Mode Control

To enable proper Auto Mode control from CoolMasterNet of the Indoor Unit connected via KRP928A2S adapter, make sure to configure SW3 switch to GLO position:

Daikin Self-diagnostic Malfunction (Error) Codes

I n d o o r U n i t	Malfunction Code	Problem Description	Supposed Causes	Models
				RA	Sky Air	VRV	Pac kage	HRV	Chil ler	Fan Coil
	A0	External protection device activated	External protection device connected to the terminal strip T1-T2 of indoor unit is activated		V	V	V
	A1	Malfunction of indoor unit PCB	Defective indoor unit PCB External factor (Noise etc.)	V	V	V	V	V	V
	A3	Drain Level Control System Abnormality	Drain clogging, upward slope, etc Defective drain pump Defective float switch or short circuit connector	V	V	V		V		V
	A4	Malfunction of freezing protection	Shortage of water volume Low water temperature setting Defective water temperature thermistor	V	V	V	V		V	V
	A5	High pressure control in heating, freeze-up protection control in cooling	Clogged air filter of indoor unit and short circuit Defect of indoor unit heat exchanger thermistor	V	V	V	V
	A6	Malfunction of fan motor	Broken wires in, short circuit of, or disconnection of connectors from the fan motor harness Defective fan motor Defective indoor unit PCB	V	V	V	V	V
	A7	Malfunction of swing flap motor	Defective swing fl ap motor Defective indoor unit PCB Defective connection cable Defective airflow direction adjusting fl ap-cam		V	V
	A8	Malfunction of power supply or AC input overcurrent	Defective power supply voltage Defective connection on signal line Defective wiring		V	V		V
	A9	Malfunction of electronic expansion valve	Defective electronic expansion valve coil Defective indoor unit PCB Defective relay cables		V	V	V	V	V
	AA	Heater overheat	26WH is activated				V		V
	AF	Malfunction of a humidifi er system	Humidifi er unit (optional accessory) leaking Defective drain piping (upward slope, etc.) Defective indoor unit PCB		V	V		V
	AH	Malfunction of dust collector of air cleaner	Defect of dust collecting element Stained insulator part Defect of high voltage power supply unit Defect of indoor unit PCB	V	V	V				V
	AJ	Malfunction of capacity setting(Indoor unit PCB)	The capacity setting adaptor was not installed when replacing PCB. Defective indoor unit PCB		V	V	V
	С1	Failure of transmission (between indoor unit PCB and sub PCB)	Defective connection of the connector between indoor unit PCB		V	V
	С4	Malfunction of liquid pipe thermistor for heat exchanger	Defective thermistor for liquid pipe Defective indoor unit PCB Defective connector contact	V	V	V	V	V	V	V
	C5	Malfunction of gas pipe thermistor for heat exchanger	Defective thermistor for gas pipe Defective indoor unit PCB Defective connector contact	V		V	V	V	V
	C6	Malfunction of fan motor sensor or fan control driver	Defective fan PCB Defective connection of capacity setting adaptor Field setting error		V	V
	C7	Front panel driving motor fault	Defective front panel driving motor Defective limit switch	V
	C9	Malfunction of suction air thermistor	Defective thermistor for suction air Defective indoor unit PCB Defective connector contact	V	V	V	V	V		V
	CA	Malfunction of discharge air thermistor	Defective thermistor for discharge air Defective indoor unit PCB Defective connector contact	V		V	V	V
	CC	Malfunction of humidity sensor system	Defective humidity sensor Defective connector contact	V	V		V
	CJ	Room temperature thermistor in remote controller abnormality	Defective room temperature thermistor in remote controller Defective remote controller PCB External factor (Noise etc.)	V	V	V	V			V
	H5	Malfunction of compressor motor overload thermistor	Defect of compressor motor overload thermistor Defective connector contact	V					V
	H6	Malfunction of position detection sensor	Faulty contact of compress or cable Defective compressor Defective outdoor unit PCB	V			V		V
	H7	Malfunction of outdoor unit fan motor signal	Abnormal signal from fan motor (Circuit failure) Disconnection/Short circuit in fan motor leads or disconnection of connector Defective inverter PCB		V	V	V		V
	H8	Malfunction of compressor input(CT) system	Defective power transistor Defective reactor Faulty wiring of inverter system Defective outdoor unit PCB	V					V
	H9	Malfunction of outdoor air thermistor	Defective connection of thermistor Defective outdoor unit PCB Defective outdoor air thermistor	V	V	V	V		V
	HC	Malfunction of (hot) water temperature thermistor	Defective connection of thermistor Defective outdoor unit PCB Defective water temperature thermistor		V	V			V
	HF	Alarm in thermal storage unit or storage controller	Thermal storage group defective wiring Defective setting Excess of thermal storage tank numbers			V
	HJ	Malfunction of thermal storage tank water level	Low water level Defective switch setting Water level detecting sensor failure Defective connector contact	V	V	V	V
	J1	Malfunction of pressure sensor	Defective pressure sensor connector contact Defective pressure sensor Defective outdoor unit PCB		V	V	V		V
	J2	Malfunction of current sensor of compressor	Defective current sensor Defective compressor Defective outdoor unit PCB	V	V	V	V		V
	J3	Malfunction of discharge pipe thermistor	Defective connection of thermistor Defective discharge pipe thermistor Defective outdoor unit PCB	V	V	V	V		V
	J4	Malfunction of low pressure equivalent saturated temperature sensor system	Defective connection of thermistor Defective thermistor Defective outdoor unit PCB			V			V
	J5	Malfunction of suction pipe thermistor	Defective connection of thermistor Defective suction pipe thermistor Defective outdoor unit PCB		V	V	V		V
	J6	Malfunction of heat exchanger thermistor
	J7	Malfunction of thermistor (Refrigerant circuit)	Defective connection of thermistor Defective liquid pipe thermistor Defective outdoor unit PCB		V	V	V		V
	J8	Malfunction of thermistor (Refrigerant circuit)	Defective connection of thermistor Defective liquid pipe thermistor Defective outdoor unit PCB	V	V	V	V		V
	J9	Malfunction of thermistor (Refrigerant circuit)	Defective connection of thermistor Defective gas pipe thermistor Defective outdoor unit PCB	V	V	V	V		V
	JA	Malfunction of high pressure sensor	Defective connector contact Connection of low pressure sensor in mistake for high pressure sensor Defective high pressure sensor Defective outdoor unit PCB		V	V	V		V
	JC	Malfunction of low pressure sensor	Defective connector contact Connection of high pressure sensor in mistake for low pressure sensor Defective low pressure sensor Defective outdoor unit PCB		V	V	V		V
	P2	Automatic refrigerant charge operation stop	The stop valve is not opened Closed valve of refrigerant tank		V	V	V		V
	P3	Malfunction of thermistor in switch box	Defective connection of thermistor Defective reactor thermistor Defective inverter PCB	V	V	V	V		V
	P4	Malfunction of radiation fi n temperature sensor	Defective radiation fi n temperature thermistor Defective inverter PCB Defective INV. compressor Defective fan motor	V	V	V	V		V
	P8	Heat exchanger freezing protection during automatic refrigerant charging	(Close the refrigerant cylinder. Start again from step 1.)		V	V	V
	P9	Malfunction of fan motor (humidifi er unit)	Defective fan motor Defective outdoor unit PCB Broken relay harness Defective connector contact	V
	P9	Automatic refrigerant charge operation completed	—		V	V	V	V
	PA	Refrigerant cylinder during automatic refrigerant charging	Refrigerant cylinder of master unit is empty		V	V	V
	PA	Broken wire of heater (humidifi er unit)	Defective heater unit Defective thermistor Defective outdoor unit PCB	V
	PC	Refrigerant cylinder during automatic refrigerant charging	Refrigerant cylinder of slave unit 2 is empty			V	V
	PE	Automatic refrigerant charge operation nearly completed	—		V	V	V
	PH	Refrigerant cylinder during automatic refrigerant charging	Defective heater unit Defective connector contact Defective thermistor Defective outdoor unit PCB	V		V	V
	PJ	Malfunction of capacity setting (Outdoor unit PCB)	Capacity setting adaptor is not installed Improper capacity setting adaptor Defective outdoor unit PCB		V
	PJ	Improper combination between inverter and fan driver	Mis-matching of type of PCB Improper (or no) fi eld setting after replacing outdoor unit main PCB		V	V	V		V
	U0	Shortage of refrigeran	Refrigerant shortage and refrigerant clogging (wrong piping) Defective thermistor Defective low pressure sensor Defective outdoor unit main PCB	V	V	V	V		V
	U1	Reverse phase, open phase	Power supply reverse phase T phase open phase Defective outdoor unit PCB (A1P)	V	V	V	V	V	V	V
	U2	Malfunction of power supply or instantaneous power failure	Abnormal power supply voltage Instantaneous power failure Defective main circuit wiring	V	V	V	V		V	V
	U3	Check operation not executed or transmission error	Check operation is not executed.	V	V	V	V	V	V	V
	U4	Malfunction of transmission between indoor and outdoor unit	Short circuit in indoor-outdoor or outdoor-outdoor transmission wiring (F1 / F2), or wrong wiring Outdoor unit power supply is OFF System address does not match Defective indoor unit PCB Defective outdoor unit PCB	V	V	V	V	V	V	V
	U5	Malfunction of transmission between indoor unit and remote controller	Transmission error between indoor unit and remote controller Connection of 2 main remote controllers (when using 2 remote controllers) Defective indoor unit PCB Defective remote controller PCB Transmission error caused by noise	V	V	V	V		V	V
	U6	Malfunction of transmission between indoor units	Faulty wiring External factor (Noise etc.) Defective indoor unit PCB			V	V		V	V
	U7	Malfunction of transmission between outdoor units or outdoor storage unit	Connection error of transmission wirings between outdoor unit and external control adaptor for outdoor unit Connection error of transmission wirings between outdoor units Defective outdoor unit PCB	V		V	V		V	V
U8	Malfunction of transmission between remote controllers	Transmission error between main and sub remote controller Connection between sub remote controllers Defective remote controller PCB		V	V	V	V	V	V
U9	Malfunction of transmission (other system)	Transmission error between other indoor and outdoor units Defective electronic expansion valve of other indoor unit Defective indoor unit PCB of other indoor unit Improper connection of transmission wiring between indoor and outdoor unit		V	V	V		V	V
UA	Defect of indoor/outdoor power supply	Wrong model connections Improper power supply Wrong PCB connected Defective PCB	V
UA	Improper combination of indoor and outdoor units	Excess of connected indoor units Defective outdoor unit PCB Mismatch of the refrigerant type of indoor and outdoor unit Setting of outdoor unit PCB was not carried out after replacing to spare PCB		V	V	V		V
UA	Remote temperature setting wire disconnection	Remote temperature setting wire disconnection Defective connector contact					V
UC	Malfunction of setting of centralized control equipment address	Address duplication of centralized control equipment Defective indoor unit PCB		V	V	V	V	V	V
UE	Malfunction of transmission between indoor unit and centralized control equipment	Transmission error between optional controllers for centralized control equipment and indoor unit Connector for setting main controller is disconnected.(or disconnection of connector for independent / combined use changeover switch.) Defective PCB for central remote controller Defective indoor unit PCB		V	V	V	V	V	V
UF	System is not set yet	Improper connection of transmission wiring between indoor-outdoor units and outdoor-outdoor units Failure to execute check operation Defective indoor unit PCB Stop valve is not opened		V	V	V	V
UH	Malfunction of system	Improper connection of transmission wiring between indoor-outdoor units and outdoor-outdoor units Defective indoor unit PCB Defective outdoor unit PCB	V		V	V
UJ	Malfunction of transmission (accessory device)	Defect of accessory devices Faulty wiring	V	V	V	V		V
60	External protection device activated (Heat reclaim ventilator)	Actuation of external protection device Defective output signal wiring Defective control PCB					V
64	Malfunction of indoor air thermistor (Heat reclaim ventilator	Defective connector contact Defective indoor air thermistor Defective control PCB					V
65	Malfunction of outdoor air thermistor (Heat reclaim ventilator)						V
6A	Malfunction of damper system (Heat reclaim ventilator)	Defective connector contact Defective limit switch Defective damper motor Defective control PCB					V
70	System No. 2 Compressor overheat	Shortage of refrigerant amount Defective connector contact Leakage of four way valve						V
71	System No. 2 Compressor overcurrent	Shortage of refrigerant amount Short circuit Defective compressor						V
72	System No. 2 Fan motor overcurrent	Defective fan motor connector contact Defective fan motor Defective PCB						V
73	System No. 2 Actuation of high pressure switch (HPS)	Dirty heat exchanger Shortage of water volume Clogged refrigerant piping Defective connector contact Defective HPS						V
74	System No. 2 Actuation of low pressure switch (LPS)	Clogged refrigerant piping Defective connector contact Shortage of gas Defective LPS						V
75	System No. 2 Malfunction of low pressure sensor	Defective connector contact Defective low pressure sensor Defective PCB						V
76	System No. 2 Malfunction of high pressure sensor	Defective connector contact Defective high pressure sensor Defective PCB						V
77	System No. 1 Malfunction of fan inter lock	Defective relay contact Broken wire						V
78	System No. 2 Malfunction of fan inter lock	Defective relay contact Broken wire						V
7A	System No. 2 Malfunction of compressor current sensor	Defective current sensor Defective compressor Defective outdoor unit PCB						V
7C	System No. 2 Malfunction of pump inter lock	Cooling water pump interlock actuated						V
80	Malfunction of entering water temperature thermistor	Defective connector contact Defective entering water temperature thermistor						V
81	Malfunction of leaving water temperature thermistor or drain pipe heater	Defective connector contact Defective leaving water temperature thermistor						V
82	System No. 1 Malfunction of refrigerant thermisto	Defective connector contact Defective refrigerant thermistor						V
83	System No. 2 Malfunction of refrigerant thermistor	Defective connector contact Defective refrigerant thermistor						V
84	System No. 1 Malfunction of heat exchanger thermistor	Defective connector contact Defective heat exchanger thermistor						V
85	System No. 2 Malfunction of heat exchanger thermistor	Defective connector contact Defective heat exchanger thermistor						V
86	System No. 1 Malfunction of discharge pipe thermistor	Defective connecting connector Defective discharge pipe thermistor						V
88	System No. 2 Malfunction of discharge pipe temperature	Shortage of gas Defective discharge pipe thermistor Defective connector contact Clogged refrigerant piping						V
89	Malfunction of brazed-plate heat exchanger freezing	Dirty heat exchanger Shortage of refrigerant amount Defective thermistor						V
8A	System No. 2 Malfunction of leaving water temperature thermistor	Defective connector contact Defective leaving water temperature thermistor						V
8E	System No. 1 Malfunction of suction pipe thermistor 1 for heating	Defective connector contact Defective suction pipe thermistor						V
8F	System No. 1 Malfunction of suction pipe thermistor 2 for heating	Defective connector contact Defective suction pipe thermistor						V
8H	Abnormal hot water high temperature	Three way valve malfunction Defective thermistor Defect of water temperature setting						V
90	Abnormal chilled water quantity or abnormal AXP	Shortage of water volume Disconnection of AXP						V
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