Room temperature thermistor. Transmit the setting information of the weekly timer to the indoor unit again. CODE General-Purpose AC Servo MELSERVO-JE Servo amplifier INSTRUCTION MANUAL (TROUBLE SHOOTING) ... To prevent electric shock, note the following. Split-Systems are smaller and typically consist of oneoutdoor unit running up to eight indoor units, making themideal for small to medium sized applications such as retailunits and small offices. Symptom: The horizontal vane does not move. 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 . Indoor unit and outdoor unit do not operate. When the rotational frequency feedback signal is not emit during the indoor fan operation. THHS thermistor problem, Thermistor fault at indoor/outdoor unit - check fault code address, Thermistor fault at indoor/outdoor unit - check fault code address (indoor fault - check SW7-3 is off), TH5 open/short circuit - check if the TH is disconnected from the board, TH6 open/short circuit - check if the TH is disconnected from the board, TH7 open/short circuit - check if the TH is disconnected from the board, TH8 open/short circuit - check if the TH is disconnected from the board, TH9 open/short circuit - check if the TH is disconnected from the board, TH10 open/short circuit - check if the TH is disconnected from the board, BC box thermistor error - TH11 open/short circuit, disconnected from board/pipe, BC box thermistor error - TH10 open/short circuit, disconnected from board/pipe, BC box thermistor error - TH open/short circuit, disconnected from board/pipe, BC box thermistor error - TH15 open/short circuit, disconnected from board/pipe, BC box thermistor error - TH16 open/short circuit, disconnected from board/pipe, Pressure sensor fault outdoor unit/BC box - check fault code address/SW1 pressure sensor readings, Pressure sensor fault (PS2) in the BC box, Pressure sensor fault (PS3) in the BC box, A-Control UH fault - see Mr Slim fault code list, Current sensor fault, ACCT or DCCT - check inv. Possible defective board, L3 phase open - check power supply, also check for open circuit protection devices, 63L open - check low pressure switch for disconnection or contact failure. Check LEV operations. Ensure information is successfully received. Buzzer sound: Triple beep. MITSUBISHI MR SLIM P SERIES (A) ERROR CODE: P6. - check mains supply, Low DC voltage on Vdc on fan inverter - check CNVdc for 300Vdc on diode stack and check mains power supply to outdoor unit, High temperature on heat sink on inverter - check for blockages in air duct, failure of INV fan or failure of thermistor, Fan inverter heat sink overheat protection. Ecodan air source heat pumps use 1kW of electrical energy input and take 2.2kW of low temperature renewable heat energy from the air, producing a high efficient 3.2kW heat energy output. Symptom: Water leaks from the outdoor unit. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Mitsubishi Air Conditioning Service Handbook PDF. Refer to “Auto restart function”. The CITY MULTI S series (for small applications) and Y series (for large applications) make use of a two-pipe refrigerant system, which allows for system changeover from cooling to heating, ensuring that a constant indoor climate is maintained in all zones. Out door control system. Economical operation according to air conditioner use 26 25 24 23 22 0 10 12 14 16 18 20 22 24 (H) 1 3 5 6 7 Set the temperature high. The control system of the Mitsubishi air conditioners reports that an error occurred by blinking of a light-emitting diode on the surface of the internal (or external) unit. Reduced airflow through heat sink. These cookies will be stored in your browser only with your consent. When the information is successfully received, a long beep will sound from the indoor unit. If you have an air conditioning fault on your Mitsubishi Electric equipment it's important to get it diagnosed quickly. The remote control signal is not received in a room where an electronic ON/ OFF type fl uorescent lamp (inverter-type fl uorescent lamp, etc.) Check the blinking pattern of the LED on the inverter P.C. F0 Tough drive warning]) error details, Temperature sensor fault - check CN30 for humidity sensor, Loose float switch connector - check switch, check CN4F on indoor unit, TB7 transmission line communication error - check for voltage abnormality/short, Transmission processor hardware error - check for noise/short on M-Net cable, Repeat address fault - two or more units are assigned the same address - correct the repeated address, Polarity setting error - no voltage or short circuit on the m-net transmission line, Hardware error of transmission processor. Protection from overheat operation(TH3). Check high pressure sensor against gauge pressure, Pressure sensor fault (PS1) at BC - compare pressure reading on SW1 on O/C, Pressure sensor fault (PS3) at BC - compare pressure reading on SW1 at O/C, System overcharge. Abnormality of outdoor fan motor rotational speed. If “P3” is still indicated, replace the indoor board. Operation Led: No lit. Frequency Inverter. General causes are outdoor unit tripped, problem with refrigerant charge or lack of air flow at the indoor unit. *Joint research with Japan Facility Solutions, Inc. Busy hours Quiet hours ... ERROR CODE AFTER TIMER TIME SUN MON TUE WED THU FRI SAT ON OFF Hr AFTER FILTER FUNCTION ONLY1Hr. CODE General-Purpose AC Servo MR-J4-_B_-RJ010 MR-J3-T10 SERVO AMPLIFIER INSTRUCTION MANUAL B HEAD OFFICE : TOKYO BLDG MARUNOUCHI TOKYO 100-8310 1CW810 MR-J4-B-RJ010 MR-J3-T10 ... To prevent electric shock, note the following WARNING Before wiring or inspection, turn off the power and wait for 15 minutes or more until the charge lamp Freezing (cooling)/overheating (heating) protection. Symptom: The unit starts operation by itself when the main power is turned on, but hasn’t received sign from the remote controller. Required fields are marked *. PROBLEM WITH AC UNIT: High condensate level – drain pump failure or blockage in the drain. Explanation & Check points: In the heating operation, vapor generated by the defrosting operation looks like white smoke. Abnormality of current sensor (P.B.). Operation of the air conditioner interferes with radio or TV reception. If the resistance is normal, replace the outdoor controller board. Move wireless device to a different location and try again. Explanation & Check points: This protects the unit according to instructions from the microprocessor. Fan motor problem. Need help? The modern air conditioners from Mitsubishi have a very developed self-diagnostics system, and when the control system detects an error, it blocks the operation of the entire device and displays a cause of faulty condition. Make sure Connect light on wireless receiver is flashing and you are 2+ feet away from wireless receiver. THHS thermistor problem, Over current protection. “Flash-injection Circuit”, which is designed for our ZUBADAN CITY MULTI (air conditioning system for cold regions), is mounted in our new Hot Water Heat Pump. Indoor coil thermistor. For details, check the LED display of the outdoor controller board. board. Explanation & Check points: A small amount of refrigerant continues to fl ow into the indoor unit even though it is not operating. 70kW. The same is true in the emergency cooling operation. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. indoor then outdoor, 51CM connector open - check thermal relay for disconnection or contact failure. Fan motor problem. Fan motor problem. Outdoor unit does not operate. WEEKLY SIMPLE AUTO OFF 8- Mitsubishi Electric MR Slim Operation Light Blinking, Flashing of POWER lamp indicates abnormalities. Symptom: The air from the indoor unit smells strange. Possible ACCT current sensor fault. Indoor unit and outdoor unit do not operate. due to change in temperature. 2) Signal transmitting/receiving circuit is abnormal. 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. Mitsubishi Electric ‘Mr. Indoor unit and outdoor unit do not operate. 6- Mitsubishi Hot Water Heat Pumps PWFY Series Error Codes. -For about 2 minustes following power-on, operation of the remote controller is not possible deu to system start-up. Indoor unit and outdoor unit do not operate. Symptom: Air does not blow out soon in the heating operation. Indoor unit does not support wireless receiver. When a power failure occurs and the main power turns off, the indoor unit built-in clock will be incorrect. Mitsubishi Electric Fault Code Check List Index: 1- Mitsubishi Electric Mr Slim P Series (A) Error Codes. This heats refrigerant in the system which in turn heats water for domestic hot water and space heating. The following is a list of Mitsubishi Air Conditioning error codes. An amplifi er may be required for the affected device. Please login to access BDT online customer service system for resellers of Mitsubishi Electric product in New Zealand.. replace the original remote controller. 2) Check with another remote controller. Open/short of discharge thermistor (TH4) and comp. Communication error between indoor and outdoor units. ERROR CODES – R410A Black = All R410A Red = FD Split 1, 2 Series R410A Blue = KX4 & KXR4 Series R410A (does not cover SRK & SCM MODELS) Can be combined to max. 4) Measure the resistance of the outdoor coil thermistor. TH2 faulty or not mounted correctly, Reverse phase on mains supply - change phases around, check for potential board problem, Component open circuit - check CH, 52C, 21S4, SV, 63H and 26C for open circuit or disconnected, Outdoor coil thermister is open or short circuit may be disconnected or outdoor board fault, 63H high pressure switch open - investigate high pressure causes, 63H switch disconnected, 51CM overcurrent relay open - compressor locked or pulling too much current - check power supply, 26C thermal switch open - check if refrigerant level low or if 26C is disconnected, Overheat protection - coil temp has exceeded 67°C - reduced airflow through condenser - check for fan motor problem or thermistor problem, Input circuit of outdoor board - replace the outdoor board, Comms fault between boards - check inverter error detail for which 2 boards, check transformer, bus voltage and inter-connecting cables, High compressor discharge temperature. Open/short of outdoor thermistors (TH3, TH6, TH7 and TH8). When the outdoor thermistors short or open circuit during the compressor operation.
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