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Self-Diagnosis by LED
Si21-205
138
Troubleshooting
3. Self-Diagnosis by LED
3.1
Self-Diagnosis with the LED on the Indoor Unit
Foreword
Troubleshooting can be carried out by service monitor LED (green). (Blinks when normal)
4
: LED on
3
: LED off
5
: LED blinks — : No connection with troubleshooting
Notes:
1. When the INSPECTION/TEST button of remote controller is pushed, INSPECTION display
blinks entering INSPECTION mode.
2. In the INSPECTION mode, when the ON/OFF button is pushed and held for 5 seconds or
more, the aforementioned malfunctioning history display is off. In this case, after the
malfunction code blinks 2 times, the code display turns to “00” (=Normal) and the unit No.
turns to “0”. The INSPECTION mode automatically switches to the normal mode (set
temperature display).
3. Operation halts due to malfunction depending on the model or condition.
4. The wiring between indoor and outdoor unit may be incorrect or disconnected. Before
performing the previously described troubleshooting, check the wiring. If the outdoor unit is
inverter unit, the outdoor unit fuse may be blown.
5. Troubleshoot by turning off the power supply for a minimum of 5 seconds, turning it back on,
and then rechecking the LED display.
3.2
Self-Diagnosis with the LED on the Outdoor Unit
The outdoor unit has one green LED (LED A) on the PCB. The flashing green LED indicates
normal condition of microcomputer operation.
Microcomputer
Normal Monitor
Contents/Processing
HAP
New Refrigerant (R410A)
5
Incorrect wiring between indoor and outdoor unit
If outdoor unit’s HAP is off, proceed outdoor unit’s trouble shooting. If outdoor
unit’s HAP blinks, failure of wiring or indoor or outdoor unit P.C board ass’y.
(Note 4)
4
Failure of indoor unit PC board ass’y (Note 5)
3
Malfunction of power supply or failure of PC board ass’y or broken
transmission wire between indoor and outdoor unit. (Note 5)
Outdoor Unit (The figure shows 50/60 class model.)
Summary of Contents for Sky Air B-Series R-410A
Page 7: ...Si21 205 vi Table of Contents ...
Page 15: ...Models Si21 205 4 Model Name and Power Supply ...
Page 16: ...Si21 205 Functions 5 Part 2 Functions 1 List of Functions 6 ...
Page 35: ...Wireless Remote Controller Si21 205 24 Remote Controller ...
Page 79: ...Settings Concerning Maintenance Si21 205 68 Field Setting Detail of PCB 2 ...
Page 83: ...Maintenance Mode Setting Si21 205 72 Field Setting ...
Page 239: ...Troubleshooting for Outdoor Unit 50 60 class Si21 205 228 Troubleshooting ...
Page 321: ...Outdoor Unit 50 60 class Si21 205 310 Removal Procedure ...