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General| Type | Heat Pump |
|---|---|
| Cooling Capacity (kW) | 22.4 |
| Heating Capacity (kW) | 25.0 |
| Refrigerant | R410A |
| Power Source | 380-415V, 50Hz |
| Operating Temperature (Cooling) | -5°C to 46°C |
Provides detailed service information for the City Multi air conditioning system.
Covers installation safety, symbols for warnings, and caution notes.
Essential guidelines for safe handling and piping of R407C refrigerant.
Proper storage methods for piping to prevent contamination and moisture.
Guidelines for machining pipes and applying appropriate oil for connections.
Comparison of tools for R407C vs R22 and notes on their handling.
Special care required during brazing to prevent foreign matter intrusion.
Methods for testing system airtightness and required tools.
Guidelines for vacuum pump usage and achieving the standard vacuum degree.
Procedure for charging refrigerant in liquid state and cylinder identification.
Instructions for replacing the dryer and timing of replacement.
Illustrations showing the components of outdoor units.
Refrigerant circuit diagram for PUHY-200/250YMF-C models.
Detailed electrical wiring diagram for PU(H)Y-(P)200/250YMF-C units.
Standard operation data for cooling mode across different models.
Standard operation data for heating mode across different models.
Details on outdoor unit initial processing, start control, and bypass operations.
Information on initial processing, start control, and bypass/capacity control.
Explanation of frequency control starting, pressure limits, and discharge temperature.
Details on oil return, subcool coil, and defrost operation controls.
Procedures for refrigerant recovery and control of fan/heat exchanger.
Control logic for BC controller valves (SVA, SVB, SVC, SVM) and LEV.
Flowchart detailing the outdoor unit's operation logic.
Flowchart illustrating the BC controller's operation for PURY models.
Flowchart detailing the indoor unit's operation logic.
Step-by-step flowchart for cooling operation.
Step-by-step flowchart for heating operation.
Step-by-step flowchart for dry operation mode.
Description of major outdoor unit components and their functions.
Description of major BC controller components and their functions.
Relationship between refrigerant amount and system operation characteristics.
Symptoms and methods for adjusting and judging refrigerant volume.
Detailed operation for adjusting refrigerant volume on specific models.
Formula and table for calculating additional refrigerant charge.
Step-by-step procedure for operating the refrigerant volume adjustment mode.
Flowchart for adjusting refrigerant volume on PUHY-P200/250YMF-C models.
Operation details for refrigerant volume adjustment on PURY-(P)200/250YMF-C.
Flowchart for adjusting refrigerant volume on PURY-200/250YMF-C models.
Troubleshooting steps for pressure sensors, including failure judging.
Checking pressure sensor configuration and solenoid valve operations.
Troubleshooting specific solenoid valves for PURY models.
Detailed troubleshooting steps for solenoid valves.
Procedure for removing the coil from the outdoor LEV.
Explanation of LEV valve operation and checking methods.
Troubleshooting steps for microcomputer driver circuit failures.
Details on check valves block for PURY models and screw key sizes.
Troubleshooting methods for IPM and diode stack components.
Troubleshooting steps when remote controller has no response.
Detailed steps for checking the 30V transmission power circuit.
Identifying symptoms caused by noise on the transmission line.
Steps to troubleshoot inverter output voltage issues.
Troubleshooting and remedies for fan motor issues.
Procedures for troubleshooting breaker tripping issues.
Methods for judging the failure of individual internal parts.
Flowchart for troubleshooting BC controller pressure sensors.
Important notes and precautions for pressure sensor replacement.
Flowchart for troubleshooting BC controller temperature sensors.
Notes and resistance graphs for temperature sensors.
Troubleshooting flowchart for LEV and solenoid valves.
Characteristics of LEV operation and related troubleshooting.
Methods for checking LEV full open/closed conditions.
Troubleshooting steps for solenoid valves.
Coordination of solenoid valves and BC controller transformer checks.
Procedure for disassembling the service panel of the BC controller.
Procedure for disassembling the control box.
Procedure for disassembling and replacing thermistors.
Procedure for disassembling and installing pressure sensors.
Procedures for disassembling LEV components.
Procedure for disassembling solenoid valve coils.
Troubleshooting for serial transmission errors.
Troubleshooting for discharge temperature abnormalities.
Troubleshooting for low pressure saturation temperature sensor errors.
Troubleshooting for various pressure abnormalities.
Troubleshooting for refrigerant amount and leakage errors.
Troubleshooting for drain pump, sensor, and float switch errors.
Troubleshooting for phase and power supply abnormalities.
Troubleshooting for fan speed and VDC sensor/circuit errors.
Troubleshooting for bus voltage and radiator panel overheat errors.
Troubleshooting for overload and IPM alarm output errors.
Troubleshooting for cooling fan abnormalities.
Troubleshooting for various thermal sensor abnormalities.
Troubleshooting for pressure sensor abnormalities.
Troubleshooting for IAC sensor/circuit and model mismatch errors.
Troubleshooting communication errors related to multiple addresses.
Troubleshooting transmission processor hardware errors.
Troubleshooting communication errors related to transmission processor.
Troubleshooting No ACK errors in single refrigerant systems.
Troubleshooting No ACK errors in plural refrigerant systems.
Troubleshooting No ACK errors in MELANS systems.
Troubleshooting errors related to total system capacity.
Troubleshooting capacity, unit count, address, and connection errors.
Troubleshooting remote sensor and model mismatch errors.
Guide to interpreting LED displays on the service monitor.
LED display data for SW1 items: relay output and error details.
LED display data for SW1 items: preliminary and sensor readings.
LED display data for SW1 items: temperature and other operational data.
Continued LED display data for SW1 items: temperature and other data.
LED display data for SW1 items: temperature readings.
LED display data for SW1 items: gas pipe temperature and SH.
LED display data for SW1 items: SC and LEV opening pulse.
LED display data for SW1 items: operation mode and filter status.
Procedure to locate leaks in extension piping or indoor units during cooling.
Procedure to locate leaks in the outdoor unit during cooling mode.
Procedure to locate leaks in extension piping or indoor units during heating.
Procedure to locate leaks in the outdoor unit during heating.
Flowchart for checking the refrigerant composition.
Notes and calibration steps for refrigerant composition check.
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