12—3 | SM YAZE218 1-A.2 GB
12—TROUBLESHOOTING
12.3
Diagnostics
12.3.1 Fault Code for Outdoor unit
The last fault occurred in the system will be stored in the EEPROM.
If no fault exist in the system, no fault code will be displayed during normal operation mode.
For single Split units only, when system enters diagnostics mode (through IDU communication), the last
fault code will be displayed even if the system has recover from that fault. The last fault will be deleted
from the EEPROM after the system has exit diagnostics mode (through IDU communication). The
current system operation mode (cool/ heat/ off) will not be changed when system enters diagnostics.
The coding method is as follow:
STATUS LED is blinking 5 times in 5 seconds, and shut off for the next 5 seconds. FAULT LED will
Only one code is shown. Order of priority is 1-24. Diagnostics is continuously ON as long power is on.
No
Problem
5
4
3
2
1
1
OCT is shorted/disconnected
0
0
0
0
1
2
CTT is shorted/disconnected
0
0
0
1
0
3
HST is shorted/disconnected
0
0
0
1
1
4
OAT is shorted/disconnected
0
0
1
0
0
5
OMT is shorted/disconnected
0
0
1
0
1
6
RGT is shorted/disconnected
0
0
1
1
0
7
RLT is shorted/disconnected
0
0
1
1
1
8
High Pressure Protection (for water Hydro
units)
0
1
0
0
0
9
Reserved (for 4-5-6 HP)
0
1
0
0
1
10
Reserved (for 4-5-6 HP)
0
1
0
1
0
11
a) Compressor IPM Fault
b) IPM Driver Pin
c) Compressor Current Sensor Fault
0
1
0
1
1
12
No Water Flow (For Hydro Units only)
0
1
1
0
0
13
Reserved
0
1
1
0
1
14
a) DC under voltage
b) DC over voltage
0
1
1
1
0
15
a) AC under voltage
b) AC over Voltage
c) Zero Crossing detection
0
1
1
1
1
16
a) Mismatch between IDU & ODU models
b) Missing ODU configuration
c) Undefined ODU Model
d) HW Type and ODU model mismatch
1
0
0
0
0
17
No Communication
1
0
0
0
1
18
System Over Power
1
0
0
1
0
19
PFC Current sensor
1
0
0
1
1
20
Heat sink Over Heating
1
0
1
0
0
21
Deicing
1
0
1
0
1
22
Compressor Over Heating
1
0
1
1
0
23
Compressor Over Current
1
0
1
1
1
24
No OFAN Feedback
1
1
0
0
0
25
a) OFAN IPM fault
b) OFAN IPM Driver Pin
1
1
0
0
1
26
Compressor Lock
1
1
0
1
0
27
Indoor Coil defrost
1
1
0
1
1
28
Reserved
1
1
1
0
0
29
Indoor Sensor Fault (for water Hydro units and
DX)
1
1
1
0
1
30
a) Outdoor Coil Overheating
b) Indoor Coil Overheating
1
1
1
1
0
31
Operation conditions exceeded
1
1
1
1
1
Summary of Contents for YAZE218
Page 11: ...4 1 SM YAZE218 1 A 2 GB 4 OUTLINE DIMENSIONS 4 OUTLINE DIMENSIONS 4 1 Indoor Unit HJD009 012 ...
Page 25: ...6 2 SM YAZE218 1 A 2 GB 6 OPERATING CURVES 6 1 2 Heating Technician Mode ...
Page 26: ...SM YAZE218 1 A 2 GB 6 3 6 OPERATING CURVES 6 1 3 Tubing Length correction Factor ...
Page 28: ...SM YAZE218 1 A 2 GB 8 1 8 WIRING DIAGRAMS 8 WIRING DIAGRAMS 8 1 YAZE218 Wiring Diagrams ...
Page 29: ...8 WIRING DIAGRAMS 9 1 SM YAZE218 1 A 2 GB 9 REFRIGERATION DIAGRAMS 9 1 YAZE218 Cooling Mode ...
Page 30: ...8 WIRING DIAGRAMS SM YAZE218 1 A 2 GB 9 2 9 2 YAZE218 Heating Mode ...
Page 77: ...14 1 SM YAZE218 1 A 2 GB 14 APPENDIX A 14 APPENDIX A INSTALLATION AND OPERATION MANUAL ...
Page 78: ...SERVICE MANUAL YAZE218 ...
