To Next PageTo Next PageHow to troubleshoot linear expansion valve on Mitsubishi Electric PKFY Air Conditioner?
To troubleshoot the linear expansion valve of your Mitsubishi Electric Air Conditioner, disconnect the connector and measure the resistance between the terminals using a tester. The surrounding temperature should be around 20°C.
How to troubleshoot vane motor on Mitsubishi Electric Air Conditioner?
To troubleshoot the vane motor of your Mitsubishi Electric Air Conditioner, measure the resistance between the terminals using a tester. The surrounding temperature should be between 20°C and 30°C.
How to troubleshoot thermistors on Mitsubishi Electric Air Conditioner?
To troubleshoot the room temperature thermistor (TH21), liquid pipe temperature thermistor (TH22), or gas pipe temperature thermistor (TH23) of your Mitsubishi Electric Air Conditioner, disconnect the connector and measure the resistance with a tester. The surrounding temperature should be between 10°C and 30°C.
What to do if valve does not close completely in Mitsubishi Electric PKFY?
If the valve does not close completely, and a large amount of refrigerant is leaked, exchange the linear expansion valve. However, if the leakage is small and not affecting normal operation, it is not necessary to exchange the linear expansion valve.
What to do in case of short or breakage of the motor coil of the linear expansion valve in Mitsubishi Electric Air Conditioner?
If there is a short or breakage of the motor coil of the linear expansion valve, exchange the linear expansion valve.
What to do if linear expansion valve mechanism is locked in Mitsubishi Electric Air Conditioner?
If the linear expansion valve mechanism is locked, exchange the linear expansion valve.
What to do if Mitsubishi Electric PKFY valve doesn't close completely?
To check the linear expansion valve for leaks, operate the indoor unit in fan mode while operating other indoor units in cooling mode. Then, check the liquid pipe temperature of the indoor unit using the outdoor multi controller board operation monitor. During fan operation, the linear expansion valve should be completely closed. If there's a leak, the thermistor's detected temperature will be lower. If the detected temperature is much lower than the temperature indicated on the remote controller, it indicates the valve isn't fully closed. If the leakage is small and not causing issues, replacing the linear expansion valve isn't necessary. However, if there is a large amount of thermistor leakage, replace the linear expansion valve.
How to troubleshoot wrong connector connection in Mitsubishi Electric PKFY Air Conditioner?
First, check the color of the lead wire and for any missing terminals on the connector. Then, disconnect the connector at the controller board and check for continuity.
How to check motor coil of linear expansion valve in Mitsubishi Electric PKFY Air Conditioner?
Measure the resistance between each coil (red-white, red-orange, brown-yellow, brown-blue) using a tester. The resistance should be approximately 150'+10%. If it's not within this range, replace the linear expansion valve.
How to troubleshoot fan motor on Mitsubishi Electric Air Conditioner?
To troubleshoot the fan motor of your Mitsubishi Electric Air Conditioner, measure the resistance between the terminals using a tester. Ensure the surrounding temperature is around 20°C.
General| Brand | Mitsubishi Electric |
|---|---|
| Model | PKFY Series |
| Category | Air Conditioner |
| Language | English |
Guidelines for safe installation and electrical work.
Explanation of safety symbols and important warning indicators.
Specific safety measures for units used with water.
Identification and description of indoor unit parts.
Details of functions available via the PAR-41MAA wired remote controller.
Technical specifications for various PKFY-WL models.
Specifications for electrical components used in the units.
Measured sound pressure levels for different fan speeds and models.
Detailed control logic and operation for COOL mode.
Control logic and operation for DRYING mode.
Control logic and operation modes for fan-only operation.
Detailed control logic and operation for HEAT mode.
Control logic for automatic switching between cool and heat modes.
Control logic when the unit is in a stopped state.
Methods for checking various internal parts for proper function.
Explanation of dip switch settings and their impact on unit functions.
Diagrams showing test points on internal circuit boards.
Steps for safely removing the unit's panel and electrical box.
Procedures for removing address, controller, and LED boards.
Steps for removing the vane motor and nozzle assembly.
Procedures for removing the indoor fan motor and thermistors.
Procedure for removing the unit's heat exchanger.
Explanation of the PAR-41MAA remote controller interface and available functions.
How to view and reset error codes on the remote controller.
Accessing and navigating the service menu for advanced settings.
Procedures for performing operational test runs using the remote controller.
How to configure various unit functions via the remote controller.
How to view and delete error history records.
Performing self-diagnostics and remote controller checks.
