10.6.3.2. Error Code27CS-ME7EB1E / CS-ME10EB1E / CS-ME12EB1E / CS-ME14EB1ESymbol Diagnosis Diagnosis methodH11 Indoor / OutdoorabnormalcommunicationThis error occurs when indoor/outdoor unit communication fails to be established after 30 seconds or more.is checkpoint>1. Measure the voltage of the indoor/outdoor unit communication cables, and check whether the voltage is beingsupplied properly to the outdoor unit or whether it is being returned from the outdoor unit to the indoor units.H12 Indoor unit capacityunmatchedThis error occurs when wrong in the total connection capacity and wrong connection in each capacity.The error is determined within 2 minutes after the power is turned on.is checkpoint>1. Check the total capacity of the units connected and check that the models are compatible for connection.H14 Intake air temp.sensorThis error occurs when the intake air temperature has exceeded above 46°C continuously for 2 minutes ordropped below -54°C continuously for 5 seconds during operation.is checkpoint>1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has beendetected.Check the sensor, and if open-circulating (more than 500k ohms) or short-circulating (less than 6.5k ohms)is not found, defective contact of the connector is possible.H16 Outdoor CurrentTransformerWhen the total current has dropped below the set current level continuously for 20 seconds during operationbeyond the set capacity, operation is stopped. Three minutes later, operation is started up again, and when thetrouble occurs on 4 successive occasions, the error occurs (the timer lamp blinks).is checkpoint>1. Check the refrigerating cycle: Gas may be leaking (the amount of refrigerant is extremely low).2. Check the control P.C. Board: Check for a broken wire (open-circuit) in the current transformer. (If open-circuit is found, replace the control P.C. Board.)In the case of a scroll compressor (DC motor), H16 is detected only when the regular compressor isoperating.H19 Indoor fan motormechanism lockÄ High-voltage PWM: When a state in which the fan motor speed is not synchronized with the control signal hasbeen detected on 7 successive occasions:Ä Low-voltage PAM: When the fan lock detection signal has been detected on 7 successive occasions or it hasbeen detected continuously for 25 seconds or when a state in which the fan motor speed is not synchronizedwith the control signal has been detected on 7 successive occasions:The error occurs (the timer lamp blinks).is checkpoint>1. Check the nature of the fan lockup trouble.2. Check for disconnections of the fan motor connectors and for defects in contact, in the fan motor and in thecontrol P.C. Board.H21 Indoor float switchabnormalityError occurs when the float switch is open for 150 seconds.is checkpoint>1. Drain blockage2. Check the conductivity of float switch.3. Check that the resistance of the drain motor is about 200 ohms.H23 Indoor heat exchangertemp. sensorThis error occurs when a temperature of under approximately -40°C or above approximately 80°C has beendetected by the heat exchanger temperature sensor continuously for 5 seconds.(This error is not detected during de-icing.)is checkpoint>1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has beendetected.Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 2.5k ohms) is notfound, defective contact of the connector or a defective control P.C. Board is possible.H27 Outdoor air temp.sensorThis error occurs when a temperature of under approximately -40°C or above approximately 150°C has beendetected by the outdoor air temperature sensor for 2 to 5 seconds. (This error is not detected during de-icing.)is checkpoint>1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has beendetected.Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is notfound, defective contact of the connector or a defective control P.C. Board is possible.H28 Outdoor heatexchanger temp.sensor 1This error occurs when a temperature of under approximately -60°C or above approximately 110°C has beendetected by the heat exchanger temperature sensor for 2 to 5 seconds. (This error is not detected during de-icing.)is checkpoint>1. This error occurs when a temperature which is impossibly high or low from a normal standpoint has beendetected.Check the sensor, and if open-circuit (more than 500k ohms) or short-circuit (less than 0.5k ohms) is notfound, defective contact of the connector or a defective control P.C. Board is possible.
