Klimaire KMIR MKMIR218-H221 Programming manual

Multi outdoor units
troubleshooting
Multi zone
CONDENSING UNITS
Model Numbers:
MKMIR218-H221, KMIR327-H217,
KMIR436-H217, KMIR545-H219
WARNING
Installation MUST conform with local building codes or, in the absence of local
codes, with the National Electrical Code NFPA70/ANSI C1-1993 or current edition
and Canadian Electrical Code Part1 CSA C.22.1.
The information contained in the manual is intended for use by a qualified service
technician familiar with safety procedures and equipped with the proper tools and
test instruments
Installation or repairs made by unqualified persons can result in hazards to you
and others.
Failure to carefully read and follow all instructions in this manual can result in
equipment malfunction, property damage, personal injury and/or death.
Table of Contents
1. Trouble Shooting
KMIR

8. Troubleshooting
8.1Safety
Because of there are capacitors in PCB and relative circuit in outdoor unit, even shut down the power
supply, electricity power still are kept in capacitors, do not forget to discharge the electricity power in
capacitor.
The value of resistance is about 1500 ohm to 2000 ohm
Electrolytic Capacitors
(HIGH VOLTAGE! CAUTION!)
Bulb (25-40W)

The voltage in P3 and P4 in outdoor PCB is high voltage about 310V
The voltage in P5 and P6 in outdoor PCB is high voltage about 310V
8.2 Indoor Unit Error Display
Console series
Operation
Timer
De-frost
Failure
★
X
X
Open or short circuit of T1 temperature sensor
X
X
★
Open or short circuit of T2 temperature sensor
X
★
X
Communication malfunction between indoor and outdoor units
★
★
X
Indoor EEPROM malfunction
X
★

Outdoor fan speed has been out of control
★
X
★
IPM module protection
★
★
★
Open or short circuit of T3 or T4 temperature sensor or Outdoor unit
EEPROM parameter error
★

X
Temperature protection of compressor top
★
◎
X
Inverter compressor drive protection
★
X

Mode conflict
★

★
Indoor fan speed has been out of control
★flash at 5Hz, light, X extinguished, ◎flash at 0.5Hz
For KDIR09-H2, KDIR12-H2, KDIR18-H2, KDIR24-H2, KTIR09-H2, KTIR12-H2, KTIR18-H2:
Operatio
n
Timer
De-frost
Alarm
Failure
Display
ODU Error
code
★
X
X
X
Open or short circuit of T1 temperature sensor
E0
——
X
X
★
X
Open or short circuit of T2 temperature sensor
E1
——
X
★
X
X
Communication malfunction between indoor and
outdoor units
E2
E2
X
X
X
★
Water-level alarm malfunction
E3
——
★
★
X
X
Indoor EEPROM malfunction
E4
——
★
X
X

IPM module protection
E5
P6
★

X
X
Open or short circuit of T3 or T4 temperature sensor
or outdoor EEPROM malfunction
E6
E0,E4

★

★
X
Outdoor fan has been out of control
E7
E8
★


X
Indoor fan speed has been out of control
F5
——
★

X

Voltage protection
P0
E5
★
X

X
Temperature protection of compressor top.
P1
P0
★
★
★
X
Outdoor unit over-current protection
P2
P3
★
◎
X
X
Inverter compressor drive protection
P4
——
★
X


Mode conflict
P5
——
★flash at 2.5Hz, light, X extinguished, , ◎flash at 0.5Hz
Note: Digital display is only available for duct type.
Oasis series:
Operation lamp
Timer lamp
Display
LED STATUS
ODU
Error
★1 time
X
E0
Indoor EEPROM malfunction
——
★2 times
X
E1
Communication malfunction between indoor and outdoor units
E2
★4 times
X
E3
Indoor fan speed malfunction.
——
★5 times
X
E4
Indoor room temperature sensor open or short circuit.
——
★6 times
X
E5
Evaporator coil temperature sensor open or short circuit.
——
★2 times

F1
Outdoor temperature sensor open or short circuit.
E4
★3 times

F2
Condenser coil temperature sensor open or short circuit.
E4
★4 times

F3
Compressor discharge pipe sensor open or short circuit.
E4
★5 times

F4
Outdoor EEPROM malfunction
E0
★6 times

F5
Outdoor fan has been out of control
E8
★7 times

F6
Indoor unit coil outlet temp. sensor open or short circuit.
E4
★1 times
★
P0
Inverter module (IPM) malfunction or IGBT over-strong current protection
P6
★2 times
★
P1
Voltage(High voltage or low voltage ) protection.
E5
★3 times
★
P2
High temperature protection of compressor top (only for M3OD-27HRDN1-M)
P0
★5 times
★
P4
Compressor drive error
——
★6 times
★
P5
Mode conflict
——
★flash , light, X extinguished
8.3 Outdoor Unit Display
8.3.1 Outdoor unit point check function
There is a check switch in outdoor PCB.

Push the switch SW1 to check the states of unit when the unit is running. The digital display tube will
display the follow procedure when push SW1 each time.
Display
Remark
0
Normal display
Display running frequency, running state or malfunction code
1
Quantity of indoor units in good connection
Actual data
Display
Number of indoor unit
1
1
2
2
3
3
4
4
2
Outdoor unit running mode code
Off:0,Fan only 1, Cooling:2, Heating:3, Forced cooling:4
3
A indoor unit capacity
The capacity unit is horse power. If the indoor unit is not connected, the digital
display tube will show: “――”
(9K:1HP,12K:1.2HP,18K:1.5HP)
4
B indoor unit capacity
5
C indoor unit capacity
6
D indoor unit capacity
7
E indoor unit capacity

8
A Indoor unit capacity demand code
Norm code*HP
(9K:1HP,12K:1.2HP,18K:1.5HP)
9
B Indoor unit capacity demand code
10
C Indoor unit capacity demand code
11
D Indoor unit capacity demand code
12
E Indoor unit capacity demand code
13
Outdoor unit amendatory capacity demand code
Forced cooling:7
14
The frequency corresponding to the total indoor
units amendatory capacity demand
15
The frequency after the frequency limit
16
The frequency sending to compressor control
chip
17
A indoor unit evaporator outlet temp.(T2BA)
If the temp. is lower than -9 degree, the digital display tube will show “-9”.If the
temp. is higher than 70 degree, the digital display tube will show “70”. If the
indoor unit is not connected, the digital display tube will show: “――”
18
B indoor unit evaporator outlet temp.(T2BB)
19
C indoor unit evaporator outlet temp.(T2BC)
20
D indoor unit evaporator outlet temp.(T2BD)
21
E indoor unit evaporator outlet temp.(T2BE)
22
A indoor unit room temp.(T1A)
If the temp. is lower than 0 degree, the digital display tube will show “0”.If the
temp. is higher than 50 degree, the digital display tube will show “50”. If the
indoor unit is not connected, the digital display tube will show: “――”
23
B indoor unit room temp.(T1B)
24
C indoor unit room temp.(T1C)
25
D indoor unit room temp.(T1D)
26
E indoor unit room temp.(T1E)
27
A indoor unit evaporator temp.(T2A)
If the temp. is lower than -9 degree, the digital display tube will show “-9”.If the
temp. is higher than 70 degree, the digital display tube will show “70”. If the
indoor unit is not connected, the digital display tube will show: “――”
28
B indoor unit evaporator temp.(T2B)
29
C indoor unit evaporator temp.(T2C)
30
D indoor unit evaporator temp.(T2D)
31
E indoor unit evaporator temp.(T2E)
32
Condenser pipe temp.(T3)
33
Outdoor ambient temp.(T4)
34
Compressor discharge temp.(TP)
The display value is between 30~129 degree. If the temp. is lower than 30
degree, the digital display tube will show “30”.If the temp. is higher than 99
degree, the digital display tube will show single digit and tens digit. For
example, the digital display tube show “0.5”,it means the compressor
discharge temp. is 105 degree.)
35
AD value of current
The display value is hex number.
For example ,the digital display tube show “Cd”, it means AD value is 205.
36
AD value of voltage
37
EXV open angle for A indoor unit
Actual data/4.
If the value is higher than 99, the digital display tube will show single digit and
tens digit.
For example ,the digital display tube show “2.0”,it means the EXV open angle
is 120×4=480p.)
38
EXV open angle for B indoor unit
39
EXV open angle for C indoor unit
40
EXV open angle for D indoor unit
41
EXV open angle for E indoor unit
42
Frequency limit symbol
Bit7
Frequency limit caused by IGBT
radiator
The display value is
hex number. For
example, the digital
display tube show
2A,then Bit5=1,
Bit3=1, Bit1=1.
It means frequency
limit caused by
T4,T3 and current.
Bit6
Frequency limit caused by PFC
Bit5
Frequency limit caused by T4.
Bit4
Frequency limit caused by T2.
Bit3
Frequency limit caused by T3.
Bit2
Frequency limit caused by T5.
Bit1
Frequency limit caused by current
Bit0
Frequency limit caused by voltage

43
Average value of T2
(Sum T2 value of all indoor units)/( number of indoor units in good connection)
44
Outdoor unit fan motor state
Off:0, High speed:1, Med speed:2, Low speed:3 Breeze:4, Super breeze:5
45
The last error or protection code
00 means no malfunction and protection
46
F indoor unit capacity
47
F Indoor unit capacity demand code
48
F indoor unit evaporator outlet temp.(T2BF)
49
F indoor unit room temp.(T1F)
50
F indoor unit evaporator temp.(T2F)
51
EXV open angle for F indoor unit
8.3.2 Outdoor unit’s digital display tube
There is a digital display tube in outdoor PCB.
Digital display tube display function
In standby , the LED displays “- -”
In compressor operation, the LED display the running frequency,
In defrosting mode, The LED displays “dF” or alternative displays between running frequency and
“dF”(each displays 0.5s)
In compressor pre-heating, The LED displays “PH”or alternative displays between running frequency
and “PH”(each displays 0.5s)
During the oil return process, The LED displays “RO” or alternative displays between running
frequency and “RO”(each displays 0.5s)
In low ambient cooling mode, the LED displays “LC” or alternative displays between running
frequency and “LC”(each displays 0.5s)
In forced cooling mode, the LED displays “FC” or alternative displays between running frequency and
“FC”(each displays 0.5s)
When PFC module protection occurs three times within 15 minutes, the LED displays “E6” or
alternative displays between running frequency and “E6”(each displays 0.5s)
In protection or malfunction, the LED displays error code or protection code.

8.3.3 Outdoor unit error display
Display
LED STATUS
IDU
Error
(Oasis)
IDU
Error
(CTBU)
E0
Outdoor EEPROM malfunction
F4
E6
E2
Communication malfunction between indoor and outdoor units
E1
E2
E3
Communication malfunction between IPM board and outdoor main
board
——
——
E4
Open or short circuit of outdoor temperature sensor (T3、T4、T5、
T2B)
F2
E6
E5
Voltage protection
P1
P0
E6
Active PFC module protection
——
——
E8
Outdoor fan speed has been out of control (Only for DC fan motor
models)
F5
——
F1
No A Indoor unit coil outlet temp. sensor or connector of sensor is
defective
——
——
F2
No B Indoor unit coil outlet temp. sensor or connector of sensor is
defective
——
——
F3
No C Indoor unit coil outlet temp. sensor or connector of sensor is
defective
——
——
F4
No D Indoor unit coil outlet temp. sensor or connector of sensor is
defective
——
——
F5
No E Indoor unit coil outlet temp. sensor or connector of sensor is
defective
——
——
F6
No F Indoor unit coil outlet temp. sensor or connector of sensor is
defective
——
——
P0
Temperature protection of compressor top
P2
P3(P1)
P1
High pressure protection
——
——
P2
Low pressure protection
——
——
P3
Current protection of compressor
——
——(P2)
P4
Temperature protection of compressor discharge
——
——
P5
High temperature protection of condenser
——
——
P6
IPM module protection
P0
E5

8.4 Diagnosis and Solution
8.4.1 Indoor unit trouble shooting
8.4.1.1 Indoor EEPROM malfunction diagnosis and solution.
Malfunction decision
conditions
PCB main chip does not receive feedback from EEPROM chip
●Installation mistake
●PCB faulty
Trouble shooting:
Supposed causes
If the EEPROM chip
is welded on PCB,
replace the PCB
directly. Otherwise,
check whether the
EEPROM chip
plugged in PCB well?
Yes
No
Yes
Insert the EEPROM well
Replace the indoor PCB.
Shut off the power supply and
turn it on 1 minute 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.

8.4.1.2 Communication malfunction between indoor and outdoor units diagnosis and
solution.
Malfunction decision
conditions
Indoor unit does not receive the feedback from outdoor unit
during 120 seconds.
Supposed causes
●Wiring mistake
●Indoor or outdoor PCB faulty
Trouble shooting:

Indoor / outdoor units communication error
Start: Power off , then Power on the
A/C by the Breaker. (reconnect the
power wire). Is it still displaying the
error code?
Yes
No
Change outdoor unit PCB assembly(include
wiring) totally
Check wiring on the outdoor and indoor
terminal follow the wiring diagram. Is all
connecting correctly?
Yes
No
Measure Vs, is it moving
alternately between positive value
and negative value? (Vs is the
voltage between S and L2). Refer
PIC 1
Turn on all indoor unit by remote
controller. Is all indoor unit display
Turn off the all indoor units. Is IPM
power LED or operating LED lamp
On? Refer PIC2
Yes
A:Is all the wiring between
terminal and Indoor PCB
connect ok?
No
Yes
A
No
Reconnect the wiring
Is indoor units number correct? Check
on the outdoor check point . (2 for dual
zone, 3 for tri zone, 4 for qua zone).
Refer PIC 4.
Yes
No first time
Yes
Yes
Change the Indoor PCB
Power on by remote
controller, IIs it still
displaying the error code
after 3 minutes?
Trouble is solved
No second time
No
Yes
Reconnect the wiring
No
change IPM
No
Is the reactor connecting
well？
No Reconnect the wiring
Change Outdoor Main PCB
Yes
No
Is main board“”
lamp on? Refer PIC 3.

Pic 1: 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.
When AC is normal running, the
voltage will move alternately
between positive value and
negative value.
Pic 2: IPM (for dual/tri/qua-zone)
Self-Check OK
Power (some
modles)
Operating

PIC 4: Check point button, press 1 time for check
how many indoor units are connected.
PIC3: Main board LED when power on and unit
standby.

8.4.1.3 zero-crossing signal error diagnosis and solution.
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.

8.4.1.4 Indoor fan speed has been out of control diagnosis and solution.
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 1 minute
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

Index 1:
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.Indoor DC fan motor (control chip is inside fan motor)
Power on and when the unit is in standby, measure the voltage of pin1-pin3, pin4-pin3 in fan motor
connector. If the value of the voltage is not in the range showing in below table, the PCB must have
problems and need to be replaced.
For other models:
DC motor voltage input and output
NO.
Color
Signal
Voltage
1
Red
Vs/Vm
200V~380V
2
---
---
---
3
Black
GND
0V
4
White
Vcc
13.5-16.5V
5
Yellow
Vsp
0~6.5V
6
Blue
FG
13.5-16.5V

8.4.1.5 Open or short circuit of temperature sensor diagnosis and solution.
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 PCB. Are
the connections good?
Correct the connections.No
Yes
Yes Replace indoor or outdoor PCB.
Replace the sensor
Check the resistance value
of the sensor via Appendix 1
and Appendix 2
Is it normal?
No

8.4.1.6 IPM module or IGBT over-strong current protection diagnosis and solution.
Malfunction decision
conditions
When the voltage signal that IPM send to compressor drive
chip is abnormal, the display LED will show “P6” and AC will
turn off.
Supposed causes
●Wiring mistake
●IPM malfunction
●Outdoor fan ass’y faulty
●Compressor malfunction
●Outdoor PCB faulty
Trouble shooting:

IPM module protection
Check whether the voltage range
of P-N on IPM module is normal?
DC277-356V for 18-27KBtu/h;
DC277-410V for 36KBtu/h
Yes
Yes
No
Yes
Check whether the input
power supply is correct?
208-230V, 1N, 60Hz
No No
Regulate it to correct, then
check whether the system
can work normally?
Check whether the
power supply line is
connected correctly and
tightly
Yes
Connect it correctly
and tightly, check ok
or not?
No
Check whether the connecting
line between main board and
the IPM module is connected
tightly
Yes
Connect it tightly,
check ok or not?
No
No
No
Connect it well, check
ok or not?
Check whether the connecting
line of the compressor is
connected correctly or tightly
Replace the IPM module,
check whether the system can
work normally?
No
No
Replace the main board; check
whether the system can work
normally?
No
Replace the compressor, check
whether the system can work
normally?
Check whether the lines
in E-part box are
connected tightly
Yes
Connect it tightly,
check ok or not?
No
No
Yes No
Replace the bridge rectifiers
Check whether the bridge rectifiers are
normal? Use the multimeter to measure
the resistance between each two
terminals, check whether there is the
condition that value of resistance is 0
Check whether the connecting line of
every reactor is normal? If the line is
broken, the resistance of the two ports is
∞(models except for KSIM40912-H216
(2G) & KSIM40912-H216 (1G))；Check
whether the PFC module broken (for
KSIM40912-H216 (2G) & KSIM40912-
H216 (1G))
Replace the connecting line or
reactor or replace the PFC
module(for M4OC-36HRFN1-M)
Yes
No
No
Yes
Trouble is solved
Check if the outdoor fan
runs properly or the outdoor
unit ventilation is good.
No
For AC fan models, please refer
to 9.4 Trouble Criterion Of Main
Parts, check whether the
resistance of the fan motor is
normal. If not, replace the fan
motor. For DC fan models, refer to
the solution of fan speed has
been out of control malfunction
. Find out the cause and have it
solved.
Yes
Yes
Yes

8.4.1.7 Over voltage or too low voltage protection diagnosis and solution.
Voltage protection
Check the voltage of
outdoor unit power supply,
whether the voltage
between L(L1) and N (L2) is
about 187~253VAC
Check the power supply
Check whether the voltage
of IPM board P and N is
normal? DC277-356V for
18-27KBtu/h; DC277-410V
for 36KBtu/h
Replace bridge rectifiers,
and then check whether the
system can run
normally(Only for qua-
zone)
Replace IPM board, and
then check whether the
system can run normally
Replace outdoor main board
Yes
No
No
No
No
Yes
Trouble is solved
Yes
Yes