To Next PageTo Next PageWhat to do if communication fails between indoor and outdoor Mitsubishi Electric SUZ-KA18NA2?
If communication fails between the indoor and outdoor unit for 3 minutes, check the indoor/outdoor connecting wire. If the problem persists, replace the indoor or outdoor P.C. board.
What to do if the discharge temperature thermistor exceeds 116°C in Mitsubishi Electric Air Conditioner?
If the temperature of the discharge temperature thermistor exceeds 116°C and the compressor stops, check the refrigerant circuit and the amount of refrigerant.
What to do if the fin temperature thermistor exceeds 86°C in Mitsubishi Electric Air Conditioner?
If the temperature of the fin temperature thermistor on the heat sink exceeds 86°C or the temperature of the P.C. board temperature thermistor on the inverter P.C. board exceeds 72 to 85°C, check around the outdoor unit and the outdoor unit air passage.
What to do if overcurrent protection cut-out operates 3 times in Mitsubishi Electric SUZ-KA18NA2 Air Conditioner?
If the overcurrent protection cut-out operates 3 consecutive times within 1 minute after the compressor starts, reconnect the connector of the compressor and check the stop valve.
What to do if the compressor connector is disconnected in Mitsubishi Electric SUZ-KA18NA2 Air Conditioner?
If the connector of the compressor is disconnected and the inverter check mode starts, check if the connector of the compressor is correctly connected.
What to do if a closed valve is detected in Mitsubishi Electric Air Conditioner?
If a closed valve is detected by compressor current, check the stop valve.
What to do if air is trapped in Mitsubishi Electric SUZ-KA18NA2 Air Conditioner?
If a closed valve and air trapped in the refrigerant circuit are detected based on the temperature sensed by the indoor and outdoor thermistors, check for a gas leak in a connecting piping, etc.
What to do if non-volatile memory data cannot be read in Mitsubishi Electric SUZ-KA18NA2?
If non-volatile memory data cannot be read properly, replace the inverter P.C. board.
General| Brand | Mitsubishi Electric |
|---|---|
| Model | SUZ-KA18NA2 |
| Category | Air Conditioner |
| Language | English |
Specifies maximum refrigerant piping lengths and height differences for models.
Details how to calculate additional refrigerant charge based on piping length.
Explains the ON/OFF timing for the outdoor fan motor relative to the compressor.
Describes the control logic for the 4-way reversing valve coil.
Details the correlation between main sensors and actuators for system operation.
Instructions for modifying the defrost finish temperature using a jumper.
Describes the pre-heat control function to prevent issues at low outside temperatures.
Lists symptoms, check codes, conditions, and remedies for common faults.
Step-by-step guide for using the self-diagnosis function via wired remote.
Procedure to diagnose remote controller communication and functionality.
Guide for performing self-diagnosis using a wireless remote controller.
Explains LED blink patterns and check codes for indoor and outdoor unit errors.
Provides resistance and voltage criteria for checking key components like thermistors and motors.
Outlines the process for diagnosing inverter and compressor issues.
Details specific checks for compressor winding, operation time, and start failure.
Procedures for checking outdoor thermistors and the reversing valve coil resistance.
Guides for diagnosing outdoor fan motor operation and power supply issues.
Steps for checking the LEV and diagnosing the inverter P.C. board.
Procedures to identify and resolve miswiring and serial communication errors.
Instructions for checking the defrost heater and outdoor refrigerant circuit.
Guidance on diagnosing and resolving electromagnetic noise interference with TVs or radios.
Visual diagrams of the inverter P.C. board and resistance charts for thermistors.
Detailed layout of components on the inverter P.C. board for various models.
How to configure unit functions using the remote controller, including tables of settings.
Step-by-step guide for accessing and setting functions via the wired remote controller.
Details on setting refrigerant addresses and unit numbers for indoor units.
Procedure for removing the outer cabinet and panels for access.
Steps to remove the inverter assembly, P.C. board, and related components.
Instructions for disconnecting and removing the reversing valve coil.
Procedure for removing various temperature sensors from the unit.
Steps to disconnect and remove the outdoor fan motor assembly.
Detailed steps for removing the compressor and the 4-way valve.
