innovair BIN414C2V32 User manual

BIO-INVERTER
TROUBLESHOOTING GUIDE
BIN312C2V32
BIN414C2V32
BIN520C2V32
BIN625C2V32
INVERTER MINI SPLIT SYSTEM
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10.1 Indoor Unit Error Display
Operation lamp
Timer lamp
Display
LED STATUS
☆1 time
X
E0
Indoor unit EEPROM parameter error
☆2 times
X
E1
Indoor / outdoor units communication error
☆3 times
X
E2
Zero-crossing signal detection error
☆4 times
X
E3
Indoor fan speed has been out of control
☆5 times
X
E4
Indoor room temperature sensor T1 open circuit or short
circuit
☆6 times
X
E5
Evaporator coil temperature sensor T2 open circuit or
short circuit
☆7 times
X
EC
Refrigerant leakage detection
☆2 times
O
F1
Outdoor temperature sensor T4 open circuit or short
circuit
☆3 times
O
F2
Condenser coil temperature sensor T3 open circuit or
short circuit
☆4 times
O
F3
Compressor discharge temperature sensor T5 open
circuit or short circuit
☆5 times
O
F4
Outdoor unit EEPROM parameter error
☆1 times
☆
P0
IPM malfunction or IGBT over-strong current protection
☆2 times
☆
P1
Over voltage or over low voltage protection
☆5 times
☆
P4
Inverter compressor drive error
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10.2 Outdoor unit error display
BIN414C2V32-O
There’s a LED light on the outdoor PCB which is blue color.
After power on, it will be slow flash(0.2Hz) when the unit is in standby and quick flash (2.5Hz) if
the unit has some problems, it will be solid light when the unit is running.
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BIN520C2V32-O
standby
operating
LED2
slow flashing(0.2Hz)
on
LED1
on
on
The picture of PCB above is only for reference.
LED 1 is a red light and for the PCB POWER display.
LED 2 is a yellow light. After power on, it will be slow flash(0.2Hz) when the unit is in standby and quick
flash (2.5Hz) if the unit has some problems.
LED 4(green) and LED3 (red) are two lights controlled by the compressor drive chip. Below are
meanings for those lights.
LED3(red) &LED4 (green)
LED2 (yellow)
LED1(red)
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No.
Problems
LED4
(Green)
LED3
(Red)
IU display
1
standby for normal
O
X
2
Operation normally
X
O
3
IPM malfunction or IGBT over-strong current protection
☆
X
P0
4
Over voltage or too low voltage protection
O
O
P1
5
Over voltage or too low voltage protection
O
☆
P1
6
Inverter compressor drive error
X
☆
P4
7
Inverter compressor drive error
☆
O
P4
8
Inverter compressor drive error
☆
☆
P4
O（light）X（off）☆（2.5Hz flash）
BIN625C2V32-O
There’s a LED light on the outdoor PCB which is blue color.
After power on, it will be slow flash(0.2Hz) when the unit is in standby and quick flash (2.5Hz) if
the unit has some problems.
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10.3 Diagnosis and Solution
10.3.1 EEPROM parameter error diagnosis and solution(E0/F4)
Error Code
E0/F4
Malfunction decision
conditions
Indoor or outdoor PCB main chip does not receive feedback
from EEPROM chip.
Supposed causes
●Installation mistake
●PCB faulty
Trouble shooting:
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 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. For the location of EEPROM chip, please refer to the below photos.
Indoor PCB
Outdoor PCB
Note: The two photos above are only for reference, it’s may be not same totally with the ones on
your side.
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10.3.2 Indoor / outdoor unit’s communication diagnosis and solution(E1)
Error Code
E1
Malfunction decision
conditions
Indoor unit does not receive the feedback from outdoor unit during
110 seconds and this condition happens four times continuously.
Supposed causes
●Wiring mistake
●Indoor or outdoor PCB faulty
Trouble shooting:
Yes
Yes
Measure Vs, is it moving alternately
with positive value?
(Vs is the voltage between L2 and S
of outdoor unit. Connect the red pin of
multimeter with L2 port, black pin 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
Replace the outdoor main PCB.
Power on. Is the error extinguished?
Check all the wiring with indoor units.
Is the wiring to the indoor main PCB
connected correctly?
Replace the indoor main PCB.
Yes
Replace the outdoor main PCB.
No
Check all the wiring with outdoor
units. Is the wiring to the outdoor
main PCB connected correctly? Is
the reactor connected well?
Power on. Is the error extinguished?
Replace the indoor main PCB.
No
Yes
Measure the resistance of the
reactor(The one without capacitor).
If it is zero ,follow the below step. If
not, replace a new reactor.
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36
Remark:
Use a multimeter to test the DC
voltage between L2 port and S port of
outdoor unit. The red pin of
multimeter connects with L2 port
while the black pin is for S port.
WhenAC is normal running, the
voltage will move alternately between
-50V to 50V.
If the outdoor unit has malfunction,
the voltage will move alternately with
positive value.
While if the indoor unit has
malfunction, the voltage will be a
certain value.
Remark:
Use a multimeter to test the
resistance of the reactor which does
not connect with capacitor.
The normal value should be around
zero ohm. Otherwise, the reactor
must have malfunction and need to
be replaced.
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10.4.3 Zero crossing detection error diagnosis and solution(E2)
Error Code
E2
Malfunction decision
conditions
When PCB does not receive zero crossing signal feedback for 4
minutes or the zero crossing signal time interval is abnormal.
Supposed causes
●Connection mistake
●PCB faulty
Trouble shooting:
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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10.4.4 Fan speed has been out of control diagnosis and solution(E3)
Error Code
E3
Malfunction decision
conditions
When indoor fan speed keeps too low (300RPM) for certain time,
the unit will stop and the LED will display the failure.
Supposed causes
●Wiring mistake
●Fan ass’y faulty
●Fan motor faulty
●PCB faulty
Trouble shooting:
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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Index 1:
1.Indoor AC fan motor
Measure the resistance value of each winding by using the tester.
For the definite value of the resistance, refer to page61 and page64.
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 have problems and need to be replaced.
2.Outdoor DC Fan Motor(control chip is in outdoor PCB)
NO.
1
2
3
4
5
Color
Orange
Grey
White
Pink
Black
Signal
Hu
Hv
Hw
Vcc
GND
Color
Red
Blue
Yellow
Signal
W
V
U
1) Release the UVW connector. Measure the resistance of U-V, U-W, V-W. If the resistance is not
equal to each other, the fan motor must has problems and need to be replaced. Otherwise, go to
step 2.
2) Power on and when the unit is in standby, measure the voltage of pin4-5 in feedback signal
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connector. If the value is not 5V, change the PCB. Otherwise, go to step 3.
3) Rotate the fan by hand, measure the voltage of pin1-5, pin 2-5 and pin 3-5 in feedback signal
connector. If any voltage is not positive voltage fluctuation, the fan motor must has problems and
need to be replaced.
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10.4.5 Open circuit or short circuit of temperature sensor diagnosis and solution(E5)
Error Code
E5
Malfunction decision
conditions
If the sampling voltage is lower than 0.06V or higher than 4.94V,
the LED will display the failure.
Supposed causes
●Wiring mistake
●Sensor faulty
●PCB faulty
Trouble shooting:
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(p64)and table
2(p65), is it normal?
No
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10.4.6 Refrigerant Leakage Detection diagnosis and solution(EC)
Error Code
EC
Malfunction decision
conditions
Define the evaporator coil temp.T2 of the compressor just starts
running as Tcool.
In the beginning 5 minutes after the compressor starts up, if T2
＜Tcool－2℃does not keep continuous 4 seconds and this
situation happens 3 times, the display area will show “EC” and
AC will turn off.
Supposed causes
●T2 sensor faulty
●Indoor PCB faulty
●System problems, such as leakage or blocking.
Trouble shooting:
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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10.4.7 IPM malfunction or IGBT over-strong current protection diagnosis and solution(P0)
Error Code
P0
Malfunction decision
conditions
When the voltage signal that IPM send to compressor drive chip
is abnormal, the display LED will show “P0” and AC will turn off.
Supposed causes
Wiring mistake; IPM malfunction; Outdoor fan ass’y faulty
Compressor malfunction; Outdoor PCB faulty
Trouble shooting:
Check if the wiring between main
PCB and compressor connected by
error and if the wires and connectors
are broken?
Correct the connection or replace
the wires and connectors.
Yes
No
IPM continuity check. Check if the
IPM terminal resistance values are
uniform. Refer to page 64.
Replace the IPM board or replace the
main PCB if the IPM board and main
PCB are integrated together.
No
Check if the outdoor fan runs
properly or the outdoor unit
ventilation is good.
Yes
No please refer to the below remark, check whether the
resistance of the fan motor is normal. If not, replace
the fan motor.
Yes
Check if the compressor resistance
values are uniform .Refer to page 63. No Replace the compressor.
Yes
Replace the outdoor main PCB if the
main PCB and IPM are separate.
connector, the resistance should be around 88.5Ωat 20℃(68℉)
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P-U
P-V
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P-W
P-N
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10.4.8 Over voltage or too low voltage protection diagnosis and solution(P1)
Error Code
P1
Malfunction decision
conditions
An abnormal voltage rise or drop is detected by checking the
specified voltage detection circuit.
Supposed causes
●Power supply problems.
●System leakage or block
●PCB faulty
Trouble shooting:
Check if the power supply is
normal.
Check if all the connections
and wires are good?
Disconnect the unit with power
supply and try to restart the unit
when power supply gets normal.
No
Yes
No Correct the connections or replace
the wires.
Yes
Power on and when the unit is in
standby, check if the voltage
between P and N is around DC
310V or 340V or 380V? For different
kinds of units, the voltage differs.
Consult with technical engineer to
get definite value. Then start up the
unit, measure the voltage between
P and N. Is it in 220V~400V?
Replace outdoor main PCB.
Yes
No Replace the IPM board if it is separate
with main PCB.
Remark:
Measure the DC voltage
between P and N port.
The normal value should
be around 310V.
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10.4.9 High temperature protection of compressor top diagnosis and solution(P2)
Error Code
P2
Malfunction decision
conditions
If the sampling voltage is not 5V, the LED will display the failure.
Supposed causes
●Power supply problems.
●System leakage or block
●PCB faulty
Trouble shooting:
Check if the air flow system
of indoor and outdoor units
are obstructed?
Clear up the air inlet and outlet or the heat
exchanger of indoor and outdoor units.
Yes
No
Yes
Yes
Turn off the power supply and turn
it on 10 minutes later.
Check if the unit can
start normally. No
Check if the refrigerant
charge volume is normal?
Recharge the correct
refrigerant volume.
Refrigerant system is blocked, such
as capillary or welded point of pipes.
Yes
Check if all the connection, especially
the connection of OLP (Over Load
Protector) sensor is good. Correct the connection.
No
Measure the resistance
between the two ports of
the OLP. Is it zero?
Yes
Replace the OLP.No
Replace the outdoor control PCB.Yes
No
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10.4.10 Inverter compressor drive error diagnosis and solution(P4)
Error Code
P4
Malfunction decision
conditions
An abnormal inverter compressor drive is detected by a special
detection circuit, including communication signal detection,
voltage detection, compressor rotation speed signal detection
and so on.
Supposed causes
Wiring mistake; IPM malfunction; Outdoor fan ass’y faulty
Compressor malfunction; Outdoor PCB faulty
Trouble shooting:
Check if the wiring between main
PCB and compressor connected by
error and if the wires and connectors
are broken?
Correct the connection or replace
the wires and connectors.
Yes
No
IPM continuity check. Check if the
IPM terminal resistance values are
uniform. Refer to page 64.
Replace the IPM board or replace the
main PCB if the IPM board and main
PCB are integrated together.
No
Check if the outdoor fan runs
properly or the outdoor unit
ventilation is good.
Yes
No please refer to the below remark, check whether the
resistance of the fan motor is normal. If not, replace
the fan motor.
Yes
Check if the compressor resistance
values are uniform .Refer to page 63. No Replace the compressor.
Yes
Replace the outdoor main PCB if the
main PCB and IPM are separate.
6) BIN625C2V32-IW and MS11D-22HRDN1-MN10W models: Measure the black pin and red pin of the motor
connector, the resistance should be around 88.5Ωat 20℃(68℉)
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