innovair Oasis WOE36C2DB1 User manual

Oasis
TROUBLESHOOTING GUIDE
©2015 Innovair Corporation. All Rights Reserved.
www.innovair.com
WOE36C2DB1 / HOE36C2MR1
MINI SPLIT SYSTEM
E1

9. Troubleshooting
9.1 Indoor unit error display
Operation lamp
Auto lamp
Timer lamp
Failure
☆
☆
☆
Over current protection occurs 4 times
☆
X
☆
EEPROM error
X
X
☆
The T1 sensor is open circuit or short circuit
☆
X
X
The T2 sensor is open circuit or short circuit
X
☆
X
Indoor / outdoor units communication error
O（light）X（off）☆（flash）

9.2 Diagnosis and Solution
9.2.1 Over current protectionoccurs4 times diagnosis and solution
No
Correct the operation condition.
Check if the voltage of the
power supply is too low?Yes Repair the power supply.
Is the outdoor
operation temperature
too high? Does the
outdoor unit has bad
air circulation?
Yes
No
Check if the outdoor
fan can run properly? No Correct the connection of fan motor or replace the fan motor.
Yes
Yes Check if the compressor
is normal running No Replace the compressor
Yes
Replace the capillary.
Evacuate the system
and recharge refrigerant.
Disconnect with the power
and replace the main PCB.
Turn on the units and check
if the problem remains

9.2.2 The temp sensor is open circuit or short circuit diagnosis and solution
Check the connections
between temperature
sensor and PCB. Are
the connections good?
Correct the connections.No
Yes
Yes Replace indoor or outdoor PCB.
Replace the sensor and
check if the problem
happen again?
9.2.3 EEPROM parameter error diagnosis and solution
Is the EEPROM chip
plugged in PCB well?
Yes
No
Yes
Correct the connection.
Replace the indoor PCB.
Shut off the power supply and
turn it on 5 seconds later. Is it
still displaying the error code?

9.2.4 Communication malfunction between indoor unit and outdoor unit diagnosis and solution
Yes
Yes
Measure Vs, is it moving alternately
between positive value and negative
value?
(Vs is the voltage between S and N of
outdoor unit.)
Yes
Power off, then turn on the unit 5 seconds
later(reconnect the power wire).Is the error
still displaying after several minutes?
No
Yes
Change the outdoor Main PCB.
Power on. Is the error extinguished?
Check all the wirings between indoor and
outdoor, indoor PCB and outdoor PCB
following the wiring diagram. Are all the
wirings connected correctly?
Is the wiring to the indoor PCB
connected correctly?
Change the indoor PCB.
Yes
Change the outdoor main PCB.
No
Is the wiring to the outdoor PCB
connected correctly?
Power on. Is the error extinguished?
Change the outdoor main PCB.
No