ENGLISH
12.2 ALARM CODE INDICATION ON REMOTE CONTROL SWITCH (PC-ARFH2E)
Alarm indication
Alarm code
12.2.1 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
2nd 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
61
-
(o)
(o)
Communication
Triggered in case no YCC messages
have been received for more than
180 seconds since last message was
received.
In case this alarm appears, software
stops Indoor and Outdoor operations
until communication is restored.
YCC stops sending messages to slave
unit since YCC has been powered OFF
or disconnected from the H-Link Line or
H-Link line has been damaged
70
P70
o
o
Indoor
Hydraulic alarm flow & Water Pump
malfunction
Water flow is not detected in the
hydraulic cycle or Pump defective
72
o
o
Indoor
Thermostat Heater Alarm
High temperature is detected in Electric
Heater
73
o
o
Indoor
Mixing over-temperature limit protection
for Mixed circuit.
Circuit 2 supply temperature > Target
tempe offset
TROUBLESHOOTING
PMML0575 rev.2 - 03/2022
319
