Haier Yl H24 Manual

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Failure diagnosis
Upon abnormal operation:
Please read the
Users Manualattached with the indoor unit before asking for
repairing. You may contact the after-sal es technicians after careful checkup.
When faults arise, the symbol
appears along with the error code.
The central controller faults corresponding to error codes are given in the
following list (including air conditioner...

Commercial Air Conditioner
Function description:
1.9 Central Controller ICR01 0010451974A
ICR01 central controller is developed from YCZ-A001, the operation and dimension is same with
YCZ-A001, please refer YCZ-A001 part, ICR01 is used for X Multi, MRVII(R22, R410A) series, YCZ-
A001 is used for Unitary Free, Unitary smart and Free Multi seires. But the wiring installation is
completely different.
1.9.1 Appearance
Figure 1
To t a l o n / To t a l o f f
1
17
33
49 2
18
34
50 3
19
35
51 4
20
36
52 5
21...

Commercial Air Conditioner
1.9.3. Installation drawing
LN
(1PH, 220V AC power source)
0010451974A
ICR01
Central controller
Figure 3. back of central controller
1.9.5. Communication wire specs
The wire between connecting board to the central contro ller is the dual-core STP (shielded twisted pair).
The detailed specs are as below:
wire length(m)

Commercial Air Conditioner
00: 1~64 01: 65~128
10: 129~192 11: 193~256
position1
0: ON
1: OFF
indoor bus line
central bus line
2
master controller
slave controller34
For example:
Select central bus line, master central controller, co ntrol range is 00, so the dip switch is 1 0 0 0 (default)
Select indoor bus line, master central controller, control range is 00, so the dip switch is 0 0 0 0.
1.9.7. Can set the central control unit as a group, and the max. 64 units of indoor can be set a group.
After...

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Press[check] button, ICR01 will show the diagnostic code, when unit * is in error, and choose the \
number in 
ICR01, you will see the diagnostic code, and if not select the error units, the error u nitsnumber will be
flashing.
Diagnostic code for outdoor master unit
20Outdoor defrost temp. sensor TE error
21Outdoor ambient temp. Sensor TA error
22Outdoor suction temp. sensor TS error
24Outdoor oil temp. sensor Toil errorThe temp. tested from sensor is keeping...

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43Master discharge temp. sensor alarm in
low frequence
When inverter compressor frequence is lower than30Hz,
TD1 is higher than 110
44Communicationerror between master
unitMB89F538 and MCU 807(indoor)
No signal for over 4 minutes
45Communication error between master
unitMB89F538and MCU807(indoor)
MB89F538 and 807central controller
No signal from indoor unit or central controller for over 4
seconds
46Communication error between master
unit connecting board and...

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1.10 Weekly timer YCS-A001
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