Johnson Controls YICM012B21S User Manual

SM-18003
SERVICE MANUAL
INVERTER-DRIVEN MULTI-SPLIT SYSTEM
HEAT PUMP AIR CONDITIONERS
Service Manual
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Johnson Controls YICM012B21S Specifications

General

Brand	Johnson Controls
Model	YICM012B21S
Category	Air Conditioner
Language	English

Summary

SERVICE MANUAL

2. Important Safety Instructions

Installation Precautions

Refrigerant Precautions

Electrical Precautions

1. Installation

1.4 Control Device

2. Operation

2.2 Control Device

3. Troubleshooting

3.1 Initial Troubleshooting

3.1.3 Checking Rotary Switch and DIP Switch Settings

Verifying switch settings for unit configuration.

3.1.4 Checking Wired Controller

Diagnosing issues using the wired controller interface.

3.2 Troubleshooting Procedures

Step-by-step guides for resolving issues.

3.3 Procedures for Checking

3.4 Test Run

Steps for verifying system operation after installation.

4. Maintenance

4.2 Maintenance of Indoor Unit

Procedures for indoor unit upkeep.

4.3 Cleaning Indoor Unit Heat Exchanger

Process for cleaning the indoor heat exchanger.

5. External Input/Output and Function Setting

5.4 External Input/Output and Function Setting Mode for Indoor Unit

Setting modes for indoor units via controller.

5.5 Functions from Wired Controller

Features controllable via the wired controller.

6. Field Work Instructions

6.1 Caution for Refrigerant Leakage

Safety guidelines for refrigerant handling.

6.2 Modifications of Charging Refrigerants Other than Those Specified by Johnson Controls

Warning against using incorrect refrigerants.

6.3 Maintenance Work

6.6 Service and Maintenance Record

7. Service Parts List