York CIDH018B21S, Руководство по обслуживанию

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3-30
SM-18001-rev.1
TROUBLESHOOTING
l
The RUN indicator (red) flashes.
l
The indoor unit number (refrigerant cycle number - address number), the alarm code, the model code
1
,
the model name
1
and the number of connected indoor units are displayed on the LCD. The indoor unit
number and the alarm code are displayed on the 7-segment display of the outdoor unit PCB.
Note 1: Except for some models.
This alarm code is displayed when the indoor fan motor rotates at less than 70rpm for five seconds three
times in 30 minutes during the operation. (
A
)
Failure of I.U. PCB
Failure of I.U. PCB
Failure of I.U. PCB
Failure of I.U. PCB
1: The electrical source for I.U. PCB is not supplied
when LED4 is turned OFF.
2: Abnormal voltage is supplied
for fan motor.
Is LED4 on
I.U. PCB OFF?
1
Is LED5 on
I.U. PCB OFF?
2
Check connectors PCN7
and CN1 on I.U. PCB.
Yes
Replace I.U. PCB.
No
No
No
No
Failure of I.U. PCB
Replace I.U. PCB.
Is fan motor
speed control command to
fan motor sent correctly?
5
Yes
Yes
Is DC power
output of I.U. PCB
normal?
3
Replace I.U. PCB.
Replace I.U. PCB.
Replace I.U. PCB.
3: Measure the voltage between VCC15
and VDC - (15V+10%) with a tester.
Yes
Yes
No
Occurrence of
Alarm Code “19”
4: Measure the voltage of the following check points with a tester.
Between VCC05 and GND: 5V+4%
Between VCC13 and GND: 13.1V+10%
(Normal Voltage: DC280V)
No
Failure of Fan Motor Replace Fan Motor
Yes
Failure of I.U. PCB
Failure of Fan Motor
Is speed pulse
signal to I.U. PCB
sent correctly?
6
Replace I.U. PCB.
Replace Fan Motor.
No
Does Fan
Motor run?
Yes
5
6
6: Start the operation with CN1 on I.U. PCB connected.
It functions normally if several volts are generated between
No.2 pin of PC4 and VDC- (check point).
(NOTE)
Even if the operation is stopped, approx. 0.2V can be generated.
Yes
Check that 208/230V is
applied between
L1 and L2 of TB1.
5: Start the operation with CN1 on I.U. PCB disconnected.
It functions normally if more than 1V is generated between
No.3 pin of CN1 and VDC- (check point) for approx. 10 seconds
after starting the operation.
(NOTES)
1. Even if the operation is stopped, 0.3 to 0.4V can be generated.
2. To perform the operation “ ”, no voltage is
generated sequentially 10 seconds after start of operation.
Is DC power
output of I.U. PCB
normal?
4
● Perform the following check after
setting the airflow volume to “HIGH”.
● High voltage is applied to electrical
parts. Perform the check carefully to
prevent an electrical shock.
●
Turn OFF the power supply completely
before checking connector. Otherwise,
it may cause a DC fan motor failure.
(Built-in PCB for the DC fan motor may
be damaged.)
A
Alarm
Code
Activation of Protection Device for Indoor Fan Motor
(Indoor Unit with DC Motor)