innovair VEXUS EV10C2DB6, VEXUS H10C2MR63, VEXUS EV13C2DB6, VEXUS H13C2MR63, VEXUS EV18C2DB6 Troubleshooting Manual
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VEXUS
TROUBLESHOOTING GUIDE
EV10C2DB6 / H10C2MR63
EV13C2DB6 / H13C2MR63
EV18C2DB6 / H18C2MR63
EV24C2DB6 / H24C2MR63
MINI SPLIT SYSTEM
VEXUS
VEXUS
E1
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Troubleshooting
Indoor unit error display
Display
Operation lamp flash times
Timer lamp
Failure
E1 1 X
EEPROM error
E2 2 X
Zero crossing signal detection error
E3 3 X
Indoor fan speed has been out of control
E5 5 X
Indoor room temperature sensor T1 open circuit
or short circuit
E6 6 X
Evaporator coil temperature sensor T2 open
circuit or short circuit
EC 2 O
Refrigerant leak detection error
O（light） X（off） ☆（flash）
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www.innovair.com
Diagnosis and Solution
E1
EEPROM parameter error diagnosis and solution
If the EEPROM chip
is welded on main
PCB, replace the
main PCB directly.
Otherwise, check
whether the
EEPROM chip
plugged in main PCB
well?
Yes
No
Yes
Correct the connection.
Replace the indoor main
PCB.
Shut off the power supply and
turn it on 5 seconds later. Is it
still displaying the error code?
EEPROM: a read-only memory whose contents can be erased and reprogrammed using a pulsed voltage.
E2
Zero crossing signal detection error diagnosis and solution
Check if the connections and
power supply is normal?
Correct the connections. Turn on the
unit when the power supply is good.
No
Yes
Indoor main PCB is
defective. Replace indoor
main PCB.
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www.innovair.com
E3
Indoor fan speed has been out of control diagnosis and solution
Shut off the power supply
and turn it on 5 seconds
later. Is it still displaying
the error code?
Shut off the power supply,
rotate the fan by hand.
Does it rotate properly?
The unit operates normally.
Find out the cause and
have it solved. For
example, check
whether the fan is
blocked or the bearing
is broken?
Check the wires of fan
motor. Are all the
connections good?
No
Yes
No
Correct the connections.No
Yes
Check whether the main PCB is
normal through index 2?
Yes
Yes
Check whether the fan
motor is normal through
index 1?
Yes
Replace the fan
motor
Replace the
main PCB.
The
malfunction is
solved?
No
No
If the
malfunction is
still existing,
replace the
main PCB
No
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www.innovair.com
Index 1:
1.Indoor AC Fan Motor
Measure the resistance value of each winding by using the tester.
Index2:
1: Indoor AC Fan Motor
Power on and set the unit running in fan mode at high fan speed. After running for 15 seconds,
measure the voltage of pin1 and pin2. If the value of the voltage is less than 100V(208~240V power
supply)or 50V(115V power supply), the PCB must has problems and need to be replaced.
©2015 Innovair Corporation. All Rights Reserved.
www.innovair.com
E5 / E6
Open circuit or short circuit of temperature sensor diagnosis and solution
Check the connections
between temperature
sensor and main PCB.
Are the connections
good?
Correct the connections.No
Yes
Yes
Replace indoor or outdoor main
PCB.
Replace the sensor and
check if the problem
happen again?
Check the resistance value
of the sensor via table1
and table 2, is it normal?
No
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Indoor / outdoor unit’s communication error diagnosis and solution
Yes
Yes
Measure Vs, is it moving alternately
with positive value?
(Vs is the voltage between N and S of
outdoor unit. The red pin of
multimeter connects with N port, the
black pin of multimeter connects with
S port.)
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 main PCB and outdoor main
PCB following the wiring diagram. Are all
the wirings connected correctly?
Is the wiring to the indoor main
PCB connected correctly?
Change the indoor main PCB.
Yes
Change the outdoor main PCB.
No
Is the wiring to the outdoor main
PCB connected correctly?
Power on. Is the error extinguished?
Change the indoor main PCB.
No
©2015 Innovair Corporation. All Rights Reserved.
www.innovair.com
EC
Refrigerant Leakage Detection diagnosis and solution
Is there cool air blowing
out from indoor air outlet?
Yes
Yes
Check if T2 sensor is well
fixed. Correct the installation
or replace T2 sensor. Does
the problem remain again?
No
Is there any leakage? Especially
the connection parts, such as the
gas valve and the liquid valve.
No
Shut off the power supply and
turn it on 5 seconds later. Is it
still displaying the error code?
Replace indoor PCB.
Yes
Repair the leakage and
recharge the refrigerant.
Yes
Clear the blocking.
Yes
Is there any block i n g ? (Such as the
capillary or the welded points of the pipes.)
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