9 TROUBLESHOOTING
?
N O T E
•
(o): Option configurable from Unit controller. This alarm will be displayed if the system has been configured.
• o: Default. This alarm will be displayed in the Unit controller.
• –: No applicable.
Alarm code indication on remote control switch:
Alarm indication
Alarm code
Alarms for Indoor units:
Alarm
Code
Retry
Stop
Code
YUTAKI S
YUTAKI S
COMBI
Origin
Detail of Abnormality
Main Factors
3
-
o
o
Communication
Transmission Alarm (Not outdoor unit
detected)
Loose, disconnected, broken or short-
circuited connector
10
-
-
o
Indoor
2n DHW thermistor anomaly
Loose, disconnected, broken or short-
circuited connector
11
-
o
o
Indoor
Water inlet thermistor abnormally
(THMwi)
Loose, disconnected, broken or short-
circuited connector
12
-
o
o
Indoor
Water outlet thermistor abnormally
(THMwo)
Loose, disconnected, broken or short-
circuited connector
13
–
o
o
Indoor
Indoor Liquid Pipe Temp Thermistor
Abnormality (THMl)
Loose, disconnected, broken or short-
circuited connector
14
–
o
o
Indoor
Indoor Gas Pipe Temperature
Thermistor Abnormality (THMg)
Loose, disconnected, broken or short-
circuited connector
15
-
(o)
(o)
Indoor
Water Circuit 2 thermistor abnormally
(THMwo2)
Loose, disconnected, broken or short-
circuited connector
16
-
(o)
(o)
Indoor
Water DHW thermistor abnormally
(THMdhwt)
Loose, disconnected, broken or short-
circuited connector
17
-
(o)
(o)
Indoor
Auxiliary sensor 2 thermistor
abnormally (THMaux2)
Loose, disconnected, broken or short-
circuited connector
18
-
(o)
(o)
Indoor
Auxiliary sensor 1 thermistor
abnormally (THMaux1)
Loose, disconnected, broken or short-
circuited connector
19
-
o
o
Indoor
Water Plate HEX pipe thermistor
abnormally (THMwohp)
Loose, disconnected, broken or short-
circuited connector
25
-
(o)
(o)
Indoor
Auxiliary sensor 3 thermistor
abnormally (THMaux3)
Loose, disconnected, broken or short-
circuited connector
26
-
o
o
Indoor
Water pressure sensor (WPS)
abnormality
Loose, disconnected, broken or short-
circuited connector
40
-
o
o
Indoor
Incorrect LCD setting
Current LCD configuration does not
allow proper operation
TROUBLESHOOTING
PMML0575 rev.1 - 09/2021
154