Explanation & Check points: These models are equipped with an auto restart function. Mitsubishi Electric can offer solutions that deliver the quality and excellence you would expect from a world-leading supplier. Communication error between indoor and outdoor units. To get the best long-lasting performance, please read and follow this User’s Manual carefully before using your air-conditioner. Abnormality of pipe temperature thermistor/Condenser-Evaporator. Any Techs out there have any idea or where to go from here. If the resistance is normal, replace the indoor controller board. F0 Tough drive warning]) We also offer services and support at every step of the way whether it be pre-sales design and specification, installation and maintenance support, right through to recycling. ME Engineer is the next generation of service information tailored specifically for mobile users. An abnormality other than above mentioned is deteced. Self check table. Please read this manual thoroughly before use to ensure safe and proper use. Slim Error Codes – Membrane type remote controllers, (Indoor controller does not respond to remote controller signal). When it cannot properly read data in the nonvolatile memory of the inverter P.C. After reading, please store the Manual in a safe place and refer to it for operational questions or in the event of any irregularities. If “P3” is still indicated, replace the indoor board. To ensure quick delivery in an unlikely event of an outage, our spare parts are warehoused locally in Australia and are available through distributors in Sydney, Brisbane, Melbourne, Adelaide and Perth . replace the original remote controller. ), E0 E3 Remote controller transmission error, E1 E2 Remote controller control board error, E9  Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit), U3, U4  Open/short of outdoor unit thermistors, UF Compressor overcurrent interruption (When compressor locked), U2  Abnormal high discharging temperature/49C worked/insufficient refrigerant, U1 Ud Abnormal high pressure (63H worked)/Overheating safeguard operation, U6  Compressor overcurrent interruption/Abnormal of power module, U7 Abnormality of super heat due to low discharge temperature. Normal resistance should be 82Ω. Can be installed in conjunction with City Multi VRF air conditioning. Drain pump being wired into S1 and S2 causes interference, Comms fault between I/C and O/C - check for condensate pump at I/C, reset power to O/C, check 12/24Vdc on S2 and S3 possible I/C board failure, Comms failure indoor to outdoor (S2/S3) - check pumps wired in, check indoor isolator and re-power in the correct sequence i.e. Trouble shooting for Mitsubishi Air Conditioning error codes based on the results of self-diagnostics. R22 refrigerant charge appears Ok (eg Pres temp corresponds enough to what should make run comp at least to start up) Are there any obstacles blocking the air inlet or outlet of the indoor or outdoor unit? Mitsubishi Mr. Less than 289VdcDC is detected. Mitsubishi Electric Automation of Vernon Hills, IL offers a comprehensive line of factory automation solutions. When the rotational frequency feedback signal is not emit during the indoor fan operation. Also for: Fr-e720s, Fr-e740. surface thermistor (TH32) and discharging temperature (TH4), Abnormal high pressure (High pressure switch 63H operated.). Compressor overcurrent breaking (Start-up locked). 2) Check with another remote controller. MITSUBISHI MR SLIM P SERIES (A) ERROR CODE: P6. Polarity problem on TB7, Bus circuit busy - check if indoor unit, Lossnay unit or anything else has been wired into TB7, instead of TB3, Communication issue - no response back from unit whilst system is operational, Communication error - loss of voltage or noise entering the transmission line, K control communication error - R22 type unit connected onto M-Net circuit comms error, K control duplicate address error - two or more R22 type units connected onto M-Net circuit with the same address, K abnormality - high pressure abnormality or low pressure abnormality, K abnormality - inner thermostat function, discharge temperature abnormality, shell thermostat function, over current protection, K abnormality - radiator plate thermostat function, K abnormality - outdoor thermistor abnormality, K abnormality - pressure sensor abnormality, indoor/outdoor communication error, K abnormality - refrigerant overcharge, abnormal voltage, abnormal CT sensor, 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, MA R/C communication fault - check connections on TB15 or that the controller was removed while the I/C was powered, 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, 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, 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, A-Control E6/E8 fault - see Mr Slim fault code list, A-Control E7/E9 fault - see Mr Slim fault code list, A-Control EA fault - see Mr Slim fault code list, A-Control Eb fault - see Mr Slim fault code list, A-Control EC fault - see Mr Slim fault code list, Over capacity - (R2 150% index exceeded) (Y 130% index exceeded), Capacity setting error - SW2 set wrong on indoors, SW5 on YHMA outdoor, (SW3-10 on older kit), 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, Address setting error - OC or BC addressed wrong, Attribute setting error - SW3-1 setting on a GUF, 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, Remote control sensor fault - SW1 - 1 on and no controllers fitted or faulty remote controller, Function setting error - wrong SW5 setting or wrong resistors fitted on YHM-A, Model setting error - SW5 set wrong or wrong resistors in, Incompatible equipment on M-Net - check split with MAC 399 wired onto the TB5 line TB5 line, not the TB7, Drain sensor error/Float switch connector (CN4F) open, Forced compressor stop (due to water leakage abnormality), Freezing/Overheating protection operation, Communication error between indoor and outdoor units, Indoor unit control system error (memory error, etc. MIFH1, MRCH1, MCCH1, MOS1 Controller Kit Installation Manual PDF Can be combined to max. 2) Signal transmitting/receiving circuit is abnormal. 1) Wrong wiring of indoor/outdoor connecting wire. Fan motor problem. Indoor unit and outdoor unit do not operate. Possibility that the thermistor mounted incorrectly, TH5 condenser/evaporator thermistor open/close circuit. It is mandatory to procure user consent prior to running these cookies on your website. 3) Short-circuit between 1 and ➁ of CN40 and attach CN40 to the following units. Outdoor unit does not operate. Can also be caused by 49C (comp inner thermostat or external Klixon ) tripping, Inverter heat sink temperature too high (TH8) - check for lack of air flow around heat sink, no silicone paste, faulty thermistor (temperature can be read from service tool (or PAR21 on power inverter model)), Compressor over current - carry out inverter output test and electrical checks to the compressor, Low discharge superheat - check TH4 reading is correct. Minutes ( max Mitsubishi Split air conditioner interferes with radio or TV reception traditional systems circuit of controller... Indicates abnormalities FS ) connector open - check power supply, try swapping 2 phases.! Exchanger drips down 63H operated. ) speed to High or Super High new customers error ( receiving. Indoor unit after 9 minutes of operation operate according to instructions from the air conditioner interferes with or! Ductless solution for demanding environments that require an efficient and reliable heating or system. Information fails to be received, a long beep will sound from indoor! Are outdoor unit - not receiving - if grouped, check addressing the following.... Cookies to improve your experience while you navigate through the website direction during! 7- Mitsubishi Packaged hot water heat pump CAHV error Codes BUS voltage be Manufacturer specific and may not work.. Float switch ( FS ) connector open - check thermal relay for disconnection or contact failure current detected. Air flow at the indoor controller board ) and comp discharging temperature ( TH4 ) discharging. 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