Alarm Code - York HIDS006B21S Service Manual

TROUBLESHOOTING
Alarm
Code
l The RUN indicator (red) flashes.
l The indoor unit number (refrigerant cycle number - address number), the alarm code, the model code
the model name
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. (
Occurrence of

Alarm Code "19"

Check connectors PCN7
and CN1 on I.U. PCB.
Check that 208/230V is
applied between
L1 and L2 of TB1.
Yes
Is LED4 on
I.U. PCB OFF?
No
Is LED5 on
I.U. PCB OFF?
No
Is DC power
output of I.U. PCB
normal?
Yes
Is DC power
output of I.U. PCB
normal?
Yes
Is fan motor
speed control command to
fan motor sent correctly?
No
Failure of I.U. PCB
Replace I.U. PCB.
3-30
Activation of Protection Device for Indoor Fan Motor
1
and the number of connected indoor units are displayed on the LCD. The indoor unit
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.)
Yes
Failure of I.U. PCB
1
Yes
Failure of I.U. PCB
2
No
Failure of I.U. PCB
3
No
Failure of I.U. PCB
4
Yes
5
Does Fan
Motor run?
Yes
Is speed pulse
signal to I.U. PCB
sent correctly?
No
Failure of Fan Motor
(Indoor Unit with DC Motor)
)
A
1: The electrical source for I.U. PCB is not supplied
when LED4 is turned OFF.
2: Abnormal voltage is supplied
for fan motor.
(Normal Voltage: DC280V)
3: Measure the voltage between VCC15
and VDC - (15V+10%) with a tester.
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%
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 "
generated sequentially 10 seconds after start of operation.
No
Failure of Fan Motor
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
Failure of I.U. PCB
6
Replace Fan Motor.
Replace I.U. PCB.
Replace I.U. PCB.
Replace I.U. PCB.
Replace I.U. PCB.
", no voltage is
A
5
Replace Fan Motor
6
Replace I.U. PCB.
SM-18001-rev.1
1
,