York HIDS006B21S Service Manual page 49

Alarm
Code
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
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 a short (0.24kΩ or less) or open sensor (840kΩ or more) is detected
during a heating or cooling operation. The operation automatically restarts when the malfunction is
removed.
Is thermistor THM2 (for
outlet air temp.) connected
to THM2 of I.U. PCB?
Yes
Is resistance of THM2
between 0.24kΩ and
840kΩ?
Yes
Failure of I.U. PCB
Medium Static Type: (H,Y,C)IDM006 - 048B21S
Thermistor for
Air Outlet Temperature
Event
Failure of
Outlet Air
Thermistor
Failure of I.U. PCB
SM-18001-rev.1
Abnormality of Thermistor for Indoor Unit Outlet Air Temperature
and the number of connected indoor units are displayed on the LCD. The indoor unit
No
Connect them.
No
Failure of
Thermistor
Refer to "Alarm Code 11"
for thermistor resistance.
Cause
Failure
Incorrect Connection
(Outlet Air Thermistor)
High Static Type: (H,Y)IDH018 - 048B21S
Thermistor for
Air Outlet Temperature
Slim Type: (H,Y,C)IDS006 - 018B21S
Thermistor for
Air Outlet Temperature
Check Item
Check resistance.
Check wiring to
I.U. PCB.
Replace I.U. PCB
and check operation.
TROUBLESHOOTING
1
,
Action
(Turn OFF Main Switch)
Replace thermistor
if faulty.
Correctly connect wires.
Replace I.U. PCB
if faulty.
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