Mitsubishi Electric PUHZ-RP50VHA4 User Manual

SERVICE MANUAL
No.OCH451
REVISED EDITION-A
SPLIT-TYPE, HEAT PUMP AIR CONDITIONERS
R410A
January 2010
Outdoor unit
[model name]
PUHZ-RP35VHA4
PUHZ-RP50VHA4
PUHZ-RP60VHA4
PUHZ-RP71VHA4
PUHZ-RP100VKA
PUHZ-RP125VKA
PUHZ-RP140VKA
PUHZ-RP100YKA
PUHZ-RP125YKA
PUHZ-RP140YKA
PUHZ-RP200YKA
PUHZ-RP250YKA
[Service Ref.]
PUHZ-RP35VHA4
PUHZ-RP50VHA4
PUHZ-RP60VHA4
PUHZ-RP71VHA4
PUHZ-RP100VKA
PUHZ-RP125VKA
PUHZ-RP140VKA
PUHZ-RP100YKA
PUHZ-RP125YKA
PUHZ-RP140YKA
PUHZ-RP200YKA
PUHZ-RP200YKAR1
PUHZ-RP250YKA
PUHZ-RP60VHA4
PUHZ-RP71VHA4
Revision:
• PUHZ-RP200YKAR1 is added in
REVISED EDITION-A.
• Some descriptions have been
modified.
PARTS CATALOG (OCB451)
CONTENTS
1 TECHNICAL CHANGE ····································2
2 REFERENCE MANUAL ··································2
3 SAFETY PRECAUTION ··································2
4 FEATURES ······················································6
5 SPECIFICATIONS ···········································7
6 DATA ······························································10
7 OUTLINES AND DIMENSIONS ···················· 16
8 WIRING DIAGRAM ······································· 20
9 WIRING SPECIFICATIONS ··························· 26
10 REFRIGERANT SYSTEM DIAGRAM ··············31
11 TROUBLESHOOTING ···································35
12 FUNCTION SETTING ····································94
13 MONITORING THE OPERATION DATA BY THE REMOTE CONTROLLER ···101
14 EASY MAINTENANCE FUNCTION ·············111
15 DISASSEMBLY PROCEDURE ···················· 116
Note:
• This manual does not cover the
outdoor units. When serving out-
door units, please refer to the serv-
ice manual of outdoor unit and this
manual in a set.
• RoHS compliant products have <G>
mark on the spec name plate.
• Please void OCH451.

Mitsubishi Electric PUHZ-RP50VHA4 Specifications

General

Series	PUHZ-RP
Type	Heat Pump
Cooling Capacity	5.0 kW
Heating Capacity	6.0 kW
Refrigerant	R32
Power Supply	220-240V, 50Hz
Seasonal Energy Efficiency Ratio (SEER)	6.1
Operating Temperature Range (Cooling)	-10 to 46 °C
Operating Temperature Range (Heating)	-15 to 24 °C

Summary

Technical Changes

Reference Manuals

Indoor Unit Service Manuals

Lists service manuals for various indoor units.

Safety Precautions

Always Observe for Safety

General safety advice before accessing terminals.

Cautions Related to New Refrigerant

Safety precautions for R410A refrigerant and related procedures.

R410A Refrigerant Piping and Handling

Guidelines for new refrigerant pipes, storage, oil, and charging procedures.

R410A Refrigerant Safety and Tool Usage

Precautions on using R410A, vacuum pumps, tools, and ventilation.

Precautions When Reusing Existing R22 Refrigerant Pipes

Precautions for reusing existing R22 refrigerant pipes.

Features

Refrigerant Leakage Detection Function

Function for detecting refrigerant leakage in specific models.

Chargeless System

Pre-charged refrigerant supplied for piping length at shipment.

Specifications

Service Tools for R410A

List of exclusive service tools required for R410A refrigerant.

Data

Refilling Refrigerant Charge (R410A: kg) PUHZ-RP35~140

Refrigerant charge amounts for specific models based on piping length.

Adjusting Refrigerant Amount PUHZ-RP200/250

Procedure for adjusting refrigerant amount for specific models.

Compressor Technical Data

Technical data for compressors used in various models.

Noise Criterion Curves

Noise level characteristics across different frequency bands for various models.

Standard Operation Data

Standard operational data for various indoor and outdoor unit combinations.

Outlines and Dimensions

PUHZ-RP35VHA4 / PUHZ-RP50VHA4 Dimensions

Outlines and dimensions for PUHZ-RP35VHA4 and PUHZ-RP50VHA4 models.

PUHZ-RP60VHA4 / PUHZ-RP71VHA4 Dimensions

Outlines and dimensions for PUHZ-RP60VHA4 and PUHZ-RP71VHA4 models.

PUHZ-RP100VKA / PUHZ-RP125VKA / PUHZ-RP140VKA / PUHZ-RP100YKA / PUHZ-RP125YKA / PUHZ-RP140YKA Dimensions

Outlines and dimensions for multiple outdoor unit models.

PUHZ-RP200YKA / PUHZ-RP200YKAR1 / PUHZ-RP250YKA Dimensions

Outlines and dimensions for specific outdoor unit models.

Wiring Diagram

PUHZ-RP35VHA4 / PUHZ-RP50VHA4 Wiring Diagram

Wiring diagram for specific outdoor unit models.

PUHZ-RP60VHA4 / PUHZ-RP71VHA4 Wiring Diagram

Wiring diagram for specific outdoor unit models.

PUHZ-RP100VKA / PUHZ-RP125VKA / PUHZ-RP140VKA Wiring Diagram

Wiring diagram for specific outdoor unit models.

PUHZ-RP100YKA / PUHZ-RP125YKA / PUHZ-RP140YKA Wiring Diagram

Wiring diagram for specific outdoor unit models.

PUHZ-RP200YKA / PUHZ-RP200YKAR1 / PUHZ-RP250YKA Wiring Diagram

Wiring diagram for specific outdoor unit models.

Wiring Specifications

Field Electrical Wiring (Power Wiring Specifications)

Specifications for field electrical wiring and power wiring.

Separate Indoor/Outdoor Unit Power Supplies

Available power supply connection patterns for separate indoor/outdoor units.

Indoor-Outdoor Connecting Cable

Cable specifications and length limitations for indoor-outdoor connections.

M-NET Wiring Method

Guidelines for M-NET wiring to prevent electromagnetic noise and ensure proper communication.

M-NET Address Setting

Procedure for setting M-NET addresses for outdoor units.

Refrigerant Address Setting

Procedure for setting refrigerant addresses for indoor units in multi-group systems.

Regulations in Address Settings

Rules for setting M-NET and refrigerant addresses in multi-group systems.

Refrigerant System Diagram

PUHZ-RP35VHA4 / PUHZ-RP50VHA4 Refrigerant System Diagram

Refrigerant system diagram for specific outdoor unit models.

PUHZ-RP100VKA / PUHZ-RP125VKA / PUHZ-RP140VKA / PUHZ-RP100YKA / PUHZ-RP125YKA / PUHZ-RP140YKA Refrigerant System Diagram

Refrigerant system diagram for specific outdoor unit models.

PUHZ-RP200YKA / PUHZ-RP200YKAR1 / PUHZ-RP250YKA Refrigerant System Diagram

Refrigerant system diagram for specific outdoor unit models.

Troubleshooting

Refrigerant Recovering (Pump Down)

Procedure for recovering refrigerant using the pump-down method.

Start and Finish of Test Run

Procedures for starting and finishing a test run, including operation mode selection.

How to Proceed "Self-Diagnosis"

Steps for identifying and clearing errors displayed during operation.

Self-Diagnosis During Maintenance or Service

Procedure to recall and check stored error code history.

Remote Controller Diagnosis

Troubleshooting steps for diagnosing remote controller issues.

Malfunction-Diagnosis Method by Wireless Remote Controller

Method for diagnosing malfunctions using a wireless remote controller.

Self-Diagnosis Action Table

Table detailing actions for self-diagnosis error codes when power is applied.

Troubleshooting by Inferior Phenomena

Troubleshooting based on observed phenomena like display issues or sounds.

Symptoms: "PLEASE WAIT" Display on Remote Controller

Diagnosis flow for "PLEASE WAIT" display issues on the remote controller.

Symptoms: Nothing Displayed on Remote Controller ①

Diagnosis flow for remote controller display issues (no display).

Symptoms: Nothing Displayed on Remote Controller ②

Diagnosis flow for remote controller display issues (checking voltage).

Symptoms: Nothing Displayed on Remote Controller ③

Diagnosis flow for remote controller display issues (checking voltage and LED status).

Frequent Customer Calls: Unit Does Not Operate

Common customer inquiries and their initial responses.

Sounds from the Air Conditioner

Explanations for various sounds heard from the air conditioner.

Blower Issues

Troubleshooting for issues related to the blower or fan speed.

Insufficient Cooling or Heating

Reasons why the room may not be cooled or heated sufficiently.

Airflow Direction Issues

Troubleshooting for issues related to airflow direction control.

Unexpected Operation/Stopping

Reasons for unexpected operation or stopping without remote control input.

Water Expulsion and Remote Controller Issues

Explanations for water expulsion and remote controller display/signal problems.

How to Check the Parts

DC Fan Motor Check Method

Method for checking the DC fan motor and outdoor controller circuit board.

How to Check the Components

Linear Expansion Valve (RP35-RP71) Operation

Details of linear expansion valve operation and connection for RP35-RP71 models.

Linear Expansion Valve (RP100-RP250) Operation

Details of linear expansion valve operation and connection for RP100-RP250 models.

Emergency Operation

Emergency Operation Procedure

Step-by-step procedure to activate emergency operation.

Releasing Emergency Operation

Steps to disable emergency operation and return to normal mode.

Operation Data During Emergency Operation

Operation data values displayed during emergency operation.

Test Point Diagram

Function of Switches, Connectors and Jumpers

Function of Switches

Description of various switches (DIP and Push) and their functions.

Function of Connectors

Description of connector functions, including emergency operation and special functions.

Low-Level Sound Priority Mode (Local Wiring)

Procedure to activate low-noise mode using external input.

On Demand Control (Local Wiring)

Procedure to reduce energy consumption using demand control.

Function Setting

Functions Available When Setting Unit Number to 01-03 or AL

Function settings for different system types and indoor units.

Selecting Functions Using the Wired Remote Controller

Procedure for selecting functions using a wired remote controller.

Selecting Functions Using the Wireless Remote Controller (Type C)

Procedure for selecting functions using a wireless remote controller.

Function Selection of Remote Controller

Details on changing remote controller functions like language, operation lock, and mode selection.

CHANGE LANGUAGE Setting

How to select the display language for the remote controller.

Function Limit Setting

How to set the operation function limit (operation lock).

Mode Selection Setting

How to set the controller mode (main/sub, clock, timer).

Display Change Setting

How to change display settings like temperature units and air temperature.

Monitoring Operation Data by Remote Controller

How to "Monitor the Operation Data"

Procedure to access and monitor operation data using the remote controller's service functions.

Request Code List

List of request codes for monitoring operation data and their descriptions.

Detail Contents in Request Code

Detailed explanation of specific request codes and their meanings.

Easy Maintenance Function

Maintenance Mode Operation Method

Procedure to activate and use the maintenance mode for checking operation data.

Guide for Operation Condition

Guide for checking operation conditions and diagnosing performance based on temperature data.

Initial Settings for Refrigerant Leakage Detection Function

How to Select the "Refrigerant Leakage Detection" Mode

Steps to select the refrigerant leakage detection mode on the remote controller.

How to Start the Initial Learning

Steps to initiate the initial learning process for refrigerant leakage detection.

How to Start "Judgment of Refrigerant Leakage" Mode

Procedure to start the refrigerant leakage judgment mode after initial learning.

How to Reset the Initial Condition (Data)

Procedure to reset initial data for refrigerant leakage detection after installation or refrigerant change.

Disassembly Procedure

Removing External Panels

Step-by-step instructions for removing external panels.

Removing the Fan Motor

Step-by-step instructions for removing the fan motor.

Removing the Electrical Parts Box

Instructions for removing the electrical parts box.

Removing Outdoor Thermistors

Instructions for removing outdoor thermistors.

Removing 4-Way Valve and LEV Coils

Instructions for removing the 4-way valve coil and LEV coils.

Removing the 4-Way Valve

Instructions for removing the 4-way valve.

Removing the Linear Expansion Valve

Instructions for removing the linear expansion valve.

Removing the High Pressure Switch

Instructions for removing the high pressure switch.

Removing the Reactor

Instructions for removing the reactor.

Removing the Compressor

Instructions for removing the compressor.

Removing the Power Receiver

Instructions for removing the power receiver.