Comms error between boards on outdoor unit. If it does not, the unit will stop. Manuals for Mitsubishi Electric Heat Pumps / Air Conditioning, Lossnay Recovery Ventilation, Hot Water Heat Pump. Updated: Wednesday, May 1, 2019 LIMITED WARRANTY STATEMENT Mitsubishi Electric M-Series Split Air-conditioner and Heat-pump Systems. Several causes are given for every error code. Please, read the manual very carefully and refer to it when installing the AC. Unit is Mitsubishi mr slim, one compressor and two Unit is Mitsubishi mr slim, one compressor and two investors. The setting range is 61 ~ 88°F (16 ~ 31°C). Wrong cable size/spec. If the resistance is normal, replace the outdoor controller board. The main PCB signals an overheat and prevents compressor damage by sending out the P2 error code and stopping the system’s work. Slim ductless A/C into my house yesterday. To fix them, simply press the "rest" button on the bottom of the unit. Remote controller issue - not receiving - if grouped, check addressing. After completing installation and the wiring and piping of the indoor and outdoor units, check for refrigerant leakage, looseness in the power supply or control wiring, wrong polarity, and no disconnection of one phase in the supply. If twinned, check wired to master indoor only, • Broken heat exchanger sensor 1 wire, poor connector connection, • Broken room temperature sensor wire, poor connector connection, • Broken heat exchanger sensor 3 wire, poor connector connection, • Defective fan motor, poor connector connection, • Heat exchanger sensor 1 wire, poor connector connection, Broken outdoor sensor wire, poor connector connection, Outdoor heat exchanger fluid pipe Sensor error, Broken heat exchanger fluid pipe sensor wire, poor connector connection, Broken discharge pipe sensor wire, poor connector connection, Broken suction pipe sensor wire, poor connector connection. Transmitting Error (PAR W21) - check refrigerant address on SW1 of Ecodan, Receiving Error (PAR W21) - check refrigerant address of SW1 on Ecodan, Indoor/Outdoor communication error - mainly due to Ecodan being powered up before FTC(2), Non-defined error code - noise interference - power down Ecodan for 30 seconds then switch back on, Serial communication fault between Ecodan main board and Ecodan inverter board - mainly due to loose CN2 or CN5 cable, Flow temp sensor fault - TH1 not connected, short or open circuit, Over heating at heat exchanger - lack of water flow, air in the system, flow rate incorrectly set, blockage or pump problem, Pipe (Liquid or 2-phase pipe) sensor error, Communication error between indoor and outdoor units, Indoor unit control system error (memory error, etc. Mitsubishi Mini Split Troubleshooting Frequently Asked Questions. • Broken heat exchanger fluid pipe sensor wire, Low pressure switch failure - check connection on the board and continuity of switch, High pressure switch failure - check connection onto board and continuity of switch, Both pressure switch contacts are open at the same time - check connection onto board and continuity of switch and for a potential board failure, Mis-wiring fault between FTC and Ecodan - check S1 ,S2,S3 also check voltages and comms, Mis-wiring fault between FTC and Ecodan - Check S1 ,S2,S3 also check voltages and comms, Unit cannot finish start up process - generally caused by a comms fault, Ecodan high pressure fault - mainly caused by incorrect water flow rates - check with flow setter, Ecodan high compressor discharge temperature - mainly caused by refrigerant shortage or dirty condenser, Ecodan discharge thermistor problem - mainly caused by TH4 discharge thermistor - open/close circuit, Open or close circuit Ecodan thermistors (TH3, TH32, TH33, TH6, TH7, TH8) - open or close circuit or disconnected from main board, Duplicate address - Lossnay units attached with the same address -, change addresses and reset the units power. Remote controller issue - not transmitting - if grouped, check addressing. region in order to deliver a reliable and proven climate control system that you can trust all year round. • Check the drain sensor heater. (RUN light is … RUN light keeps flashing 1 time flash Trouble of outdoor unit Over current Current cut 2 time flash 3 time flash RUN light ON 1 time flash 5 time flash TIMER light R410A models Series No. When a particular error of an air conditioner is detected, light-emitting diodes blink in a certain order, which corresponds with a … Please, take steps to fix the problem ASAP! 2) Signal transmitting/receiving circuit is abnormal. Failing pipe temperature sensor (TH22) in the indoor unit; Failing pipe temperature sensor (TH2) in the OA processing unit. ), Indoor/outdoor unit communication error (Transmitting error) (Outdoor unit), Compressor overcurrent interruption (When compressor locked), Abnormal high discharging temperature/49C worked/insufficient refrigerant, Abnormal high pressure (63H worked)/Overheating safeguard operation, Compressor overcurrent interruption/Abnormal of power module, Abnormality of super heat due to low discharge temperature, Abnormality such as overvoltage or voltage shortage and abnormal synchronous signal to main circuit/ Current sensor error, Refrigerant insufficient Closed service valve Heat exchanger sensor 1 error. The wire should be stranded, not solid core. If the resistance is normal, replace the indoor controller board. … 2) Signal transmitting/receiving circuit of remote controller is abnormal. 3) Short-circuit between D and (2) of CN40 and attach CN40 to the following units. M Whitner • Second and third units in triple control. Good luck Bill. Be sure that the outside humidity sensor and relay cable are properly connected. Check the ventilation system for blockages. MSZ-FA25VA air conditioner pdf manual download. Serial communication error. These functions include a two-speed fan operation, Cool, Heat, Auto, and Dry operating modes and a programmable 24-hour timer for convenient, customized cooling on/off periods. The indoor unit should get power from the outdoor one; Mitsubisi units require alternate current. In direct-current units, improper polarity will result in the indoor unit not working at all. Worked for about 60 seconds. I know that you should rarely put gauges on a ductless mini split, and that you should dump the charge and just weigh it in. 5.0 out of 5 stars 5 $24.98 $ 24 . Slim ® P-Series ducted and ductless heat pumps and air conditioners are compact yet powerful, offering unrivalled energy efficiency and design flexibility. The system may continue to cool at a lower capacity with the coil temperature dropping by around ten degrees. Therefore, a varistor failure can expose the wiring and other components to the destructive influence of power ups. Be sure that the connector CN22 on the circuit board is not loose or damaged. Maintenance, Cleaning and Guides. MITSUBISHI MR SLIM P SERIES (A) ERROR CODE: A2 CENTRAL CONTROLLER: 6602 In alternate-current devices, failure to follow the polarity will not prevent the indoor unit from running, but there will be a communication failure between the two units. If twinned, check. Please wait. The external fan or the compressor are not working. This error code signals a low pressure fault. In some cases, the head pressure drops due to faulty leaky compressor motor valves, which won’t let the compressor pressure reach the needed level. There may be leaks in the oil separator return line. Not uncommonly, the head pressure occurs due to compressor motor overheating. Slim systems from Mitsubishi Electric are the smart solution. Mitsubishi ductless-What a money pit!!! 98 The basic tools and materials required were: Four (4) capacitors, soldering iron, rosin solder, wire cutters, phillips & flat-head screw drivers and pliers.Repair estimates, from a local authorized Mitsubishi Repair Center, was between $800 - $1000 to replace the DM Module. The timer allows Mr.SLIM to be switched on or off automatically at the time is shown on the LCD. 2) Change the connection of electric wiring. If there is any serious repair needed, ask for a specialist’s help. While some manuals may only call for 18 gauge wire it is always recommended to use 14 gauge 4 conductor wire (14/4) for most systems. Noise interference. Airflow is not blown out when starting the DRY operation. In case if the item has error codes and flashes, the tables contain both of the signals. 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. SLIM MS-SD24VC operating instructions manual online. Slim includes a wireless control center that offers complete control and easy to use functions that don't require an advanced degree to operate. The lists contain also the solutions and recommendations on checking the items. (2) Select COOL mode with OPERATION SELECT button. Normal resistance should be as follows. Replacement for Mitsubishi Electric Mr Slim Air Conditioner Remote Control for MSZ-GL06NA MSZ-GL09NA MSZ-GL12NA MSZ-GL15NA (Display in Fahrenheit Only!!!) 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