Daikin RMXS-L Series User Manual

Troubleshooting for CTXG, CTXS, FTXS, CDXS, FDXS, FVXS Series SiUS181631EA
204 Troubleshooting
4.5 Front Panel Open/Close Fault
Applicable
Models
CTXG09/12/18QVJUW(S)
Error Code
C7
Error Decision
Conditions

If the error repeats, the system is shut down.
Supposed
Causes

Defective reduction motor

Malfunction or deterioration of the front panel mechanism

Defective limit switch
Troubleshooting
Note: You cannot operate the unit by the remote controller when the front panel mechanism breaks down.
<To the dealers: temporary measure before repair>
1. Turn off the power.
2. Remove the front panel.
3. Turn on the power.
(Wait until the initialization finishes.)
4. Operate the unit by the indoor unit ON/OFF button.
YES
YES
YES
YES
NO
NO
NO
NO
Replace the harness and
reduction motor.
Replace the assembly of the
front panel mechanism.
Check the movement of the
right and left separately by
hand.
Replace the assembly of the
front panel mechanism.
It is supposed such as
deformation of the panel or
stuffed dust.
Find out the cause.
Replace the limit switch.
(R17249)
Caution
Does the front panel
move?
Does the front
panel mechanism
move?
Does the front
panel open/close
fully?
Restart.
Does the error code
reappear?
Restart and check the
movement.
Remove the front panel and
check the movement.
Be sure to turn off the power switch before connecting or disconnecting
connectors, or parts may be damaged.

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.