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Service Manual
PORTABLE- PD SERIES
MODEL
51QPD009NS
51QPD012NS

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Table of Contents
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Summarization of Contents

1. Precaution
1.1 Safety Precaution
Instructions to prevent injury and property damage during operation.
1.2 Warning
Warnings related to installation and electrical safety.
2. Function and control panel
2.1 Function
Details the various operational modes and features of the unit.
2.2 Control panel
Overview of the buttons and indicators on the control panel.
6 Electronic function
6.1 Terms and definitions
Defines key terms and sensor designations used in electronic functions.
6.2 Electric Control working environment
Specifies the input voltage requirements for the electric control system.
6.3 Protection function
Describes various safety and protection mechanisms built into the unit.
6.4 Fan-only mode function requirement
Outlines operational parameters for the fan-only mode.
6.5 Cooling mode function requirement
Details the operational requirements and compressor behavior in cooling mode.
6.6 Drying mode
Explains the operational logic and conditions for drying mode.
6.7 Heating mode (heater)
Describes how the heater operates based on temperature differences.
6.8 Heating mode (heat pump)
Details operational conditions for the heat pump heating mode.
6.9 Sensor malfunction
Lists error codes and their corresponding sensor malfunction causes.
6.10 Some standard functions synopsis
Summarizes the operation of timer and sleep functions.
7 Installation details
7.1 Installation instructions
Guidance on proper placement and mounting of the unit for optimal performance.
7.2 Care and maintenance
Instructions for cleaning and maintaining the unit for longevity.
8 Basic test procedure
8.1 Defective compressor
Procedures for testing and identifying compressor issues.
8.2 Sealed refrigeration system repairs
Equipment and procedures for repairing the refrigerant system.
8.3 Fan motor
Information on the fan motor and testing procedures.
8.4 Capacitor
Details on the capacitor's function and testing methods.

Table of Contents