York IDM030B21E Series, Service Manual

Page: 38 / 144

3-16
SM-16005-rev.2
TROUBLESHOOTING
3.2 Troubleshooting Procedures
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Alarm Code Indication of Wired Controller
Sel. OP MODE
IDU : TIC4036B21S
MODEL : F .08
Alarm Code:
23
ODU : TVAHR120B31S
01-02
AlarmRst
Address
Entr
OK
(1) (2)
(3)
(5)
(4)
(6)
(7)
< CIW01 >
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The alarm code is indicated by the LED on the change-over box PCB.
: Flashing (Turn ON; 0.5 sec./Turn OFF; 0.5 sec.), X: Turn OFF.
LED
Alarm
Code
Contents
4 5 6 7
X X 03 Abnormal communication between change-over box and outdoor unit.
X X 03 Abnormal communication between change-over box and indoor unit.
C1
Two or more change-over boxes are connected between outdoor unit
and indoor unit.
X C2 Nine or more indoor units are connected to change-over box.
X X C3 The indoor units of different systems are connected to change-over box.
LED7
LED4
LED5
LED6
< PCB of Change-Over Box >
(1) Refrigerant Cycle No. (*1)
(2) Indoor Unit No. (*1)
(3) Alarm Code
(4) Unit Model Code
(5) Total Number of Indoor Units in the Same System
as the Indoor Unit Having Trouble
(6) Indoor Unit Model (*2) (*3)
(7) Outdoor Unit Model (*2) (*3)
(*1): If two or more indoor units having trouble are connected to the wired controller, the indicated indoor
unit is selectable.
(*2): The initial of model names are indicated as “T”. These “T” are replaced with “H”, “Y” or “C”.
(Except for the wall mount model.)
When there is a combination of outdoor units, ODU indication is the model of the main outdoor unit
(Unit A).
(*3): The model names are not indicated depending on the unit type.