Service manual
Table Of Contents
- DNG DC Inverter Series
- LIST OF EFFECTIVE PAGES
- TABLE OF CONTENTS
- INTRODUCTION
- PRODUCT DATA SHEET
- RATING CONDITIONS
- OUTLINE DIMENSIONS
- PERFORMANCE DATA & PRESSURE CURVES
- AIRFLOW CURVES
- SOUND LEVEL CHARACTERISTICS
- ELECTRICAL DATA
- WIRING DIAGRAMS
- REFRIGERATION DIAGRAMS
- TUBING CONNECTIONS
- CONTROL SYSTEM
- TROUBLESHOOTING
- EXPLODED VIEWS AND SPARE PARTS LISTS
- APPENDIX A
13-10
TROUBLESHOOTING
SM DNGDCI 2-E.1 GB
No Symptom Probable Cause Corrective Action
19
The unit stop suddenly during
operation
EMC interference to the
A/C unit
Check for EMC problems
20
Indoor unit(s) Indicator(s) leds
may flicker
21
Other home appliances operation
is faulty such as noise appears
in the television picture, or the
picture is distorted or static occurs
in the radio sound
EMC interference by
the A/C unit
Check for EMC problems
22
All others
Specific problems of
indoor or outdoor units
Check diagnostics
13.2.2 Checking the refrigeration system
Checking system pressures and other thermodynamic measures should be done when system is
in technician Mode where the system operates as in fixed settings. The performance curves given
in this manual are given for unit performance in Technician mode when high indoor fan speed is
selected.
13.2.3 Diagnostics
13.2.3.1 Outdoor unit diagnostics
If any fault exists in the system, it will be shown according to tIf no fault exists in the system, no
fault code will be displayed during normal operation mode, and the status led will be on while the
compressor is enable.he following coding method.
Two LEDs display the system diagnostics on real time as follows:
STATUS LED is blinking 5 times in 5 seconds, and shut off for the next 5 seconds.
FAULT LED will blink during the same 5 seconds according to the following table:
CONTENT