12—5 | SM YAZE218 1-A.2 GB
12—TROUBLESHOOTING
n
o
it
c
A
e
v
it
c
e
r
r
o
C
n
o
it
p
ir
c
s
e
D
t
l
u
a
F
e
m
a
N
t
l
u
a
F
o
N
20 Heat sink Over Heating
Compressor stopped due to heatsink
protection
Check that the air ow around the ODU
is free and the fan is running free. Check
fan motor
21 Deicing
During deicing procedure
No action required
22 Compressor Over Heating
Compressor stopped due to over heat
protection
Check if gas is missing in the system
23 Compressor Over Current
Compressor stopped due to over
current protection
No action required
24 No OFAN Feedback
No encoder signal can be detected
from the OFAN
Check DC-FAN hall sensor connection/
plug for damage. Check DC-FAN for
any blockage. Measure between U-V,
U-W for resistance using multimeter.
Resistance value should be below
1 OHM. If multimeter display high
resistance, replace DC-FAN motor,
otherewise replace controller.
25 a) OFAN IPM fault
b) OFAN IPM Driver Pin
OFAN IPM module detect shoot-
through current / OFAN IPM driver
control pin is unconditionally latch to
high state
Check DC-FAN hall sensor connection/
plug for damage. Check DC-FAN for
any blockage. Measure between U-V,
U-W for resistance using multimeter.
Resistance value should be below
1 OHM. If multimeter display high
resistance, replace DC-FAN motor.
Return controller if error is persistent.
26 Compressor Lock
No correct drive current can be
detected from the compressor
Check compressor cable or compressor
wire assembly. Make sure the phase
sequence of U-V-W is correctly plug into
the compressor.
27 Indoor Coil defrost
Compressor stopped due to Indoor
Coil defrost protection
No action required
28 Indoor Unit Sweet (future
option)
A
N
A
N
A
N
A
N
d
e
v
r
e
s
e
R
9
2
30 a) Outdoor Coil Overheating
b) Indoor Coil Overheating
This protection combines the following:
Overheating in cooling mode (based on
OMT reading). Overheating in heating
mode based on ICT.
Improper ventilation of the coils Over
charged system Problem with ICT
sensors or OMT sensor (fake up).
Illegal too small indoor unit’s installation
(heating).
31 Operation conditions are
exceeded
For cooling:
g
For Heating:
This is not a fault but information on the
ambient operation:
The unit operates outside the de ned
operation range.
The OAT fakes and cause false alarm.
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 ...
