Daikin RMXS-L Series User Manual

SiUS181631EA Troubleshooting for FFQ Series
Troubleshooting 207
5. Troubleshooting for FFQ Series
5.1 Indoor Unit PCB Abnormality
Error Code
A1
Method of Error
Detection
The system checks the data from EEPROM.
Error Decision
Conditions
The data from the EEPROM is not received correctly.
EEPROM (Electrically Erasable Programmable Read Only Memory): A memory chip that holds its
content without power. It can be erased, either within the computer or externally and usually
requires more voltage for erasure than the common +5 volts used in logic circuits. It functions like
non-volatile RAM, but writing to EEPROM is slower than writing to RAM.
Supposed
Causes

Defective indoor unit PCB

External factor (noise etc.)
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.
(R22247)
Normal?
Turn off the power. Then, turn on
the power to restart the system.
NO
YES
External factor other than malfunction
(for example, noise etc.)
Replace the indoor unit PCB
(control PCB).

Daikin RMXS-L Series Specifications

General

Brand	Daikin
Model	RMXS-L Series
Category	Heat Pump
Language	English

Summary

Part 1 List of Functions

Part 2 Specifications

1.1 Outdoor Unit

Provides detailed specifications for the outdoor unit, including capacity, dimensions, and electrical data.

1.3 Indoor Unit

Part 4 Refrigerant Circuit

1.1 Outdoor Unit

1.2 Branch Provider (BP) Unit

3. Refrigerant Flow for Each Operation Mode

Diagrams illustrating refrigerant flow during cooling, heating, and oil return operations.

Part 5 Functions and Control

1. Operation Mode

2. Basic Control

3. Special Control

4. Protection Control

Covers critical protection controls for high/low pressure, temperature, inverter, freeze-up, and condensation.

6. Branch Provider (BP) Unit Control

Part 6 Test Operation and Field Settings

1. Test Operation

Provides procedures for initial test operation, including power checks and operation verification.

2. Field Settings

Details procedures for configuring field settings on outdoor units and remote controllers.

Part 8 Troubleshooting

1. Troubleshooting with LED

Guides troubleshooting using LED indicators on outdoor unit and service PCBs for error identification.

2. Service Diagnosis

Outlines service diagnosis procedures for various indoor unit series using remote controllers and error codes.

3. Error Codes and Description

Comprehensive list of error codes with descriptions and reference pages for troubleshooting specific issues.

4. Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series

Provides specific troubleshooting steps for errors found in CTXG, CTXS, FTXS, CDXS, FDXS, FVXS series.

5. Troubleshooting for FFQ Series

Offers troubleshooting steps for errors specific to FFQ Series indoor units, covering PCB, motor, and sensor issues.

6. Troubleshooting for Branch Provider (BP) Unit

Details troubleshooting procedures for the Branch Provider (BP) unit, including expansion valve and PCB abnormalities.

7. Troubleshooting for Outdoor Unit

Covers troubleshooting for outdoor unit issues like PCB abnormalities, sensors, compressor, and fan motor problems.