Alarm Code Indication On Remote Control Switch (Pc-Arfh2E); Alarms For Indoor Units - Hitachi YUTAKI RWM-2R1E Installation & Operation Manual

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12.2 ALARM CODE INDICATION ON REMOTE CONTROL SWITCH (PC-ARFH2E)

Alarm indication

12.2.1 Alarms for Indoor units

Retry
Alarm YUTAKI
Stop
Code S S COMBI
Code
3 - o
10 - -
11 - o
12 - o
13 – o
14 – o
15 - (o)
16 - (o)
17 - (o)
18 - (o)
19 - o
25 - (o)
26 - o
40 - o
61 - (o)
70 P70 o
72 o
73 o
319 PMML0575 rev.2 - 03/2022
Alarm code
YUTAKI
Origin
Transmission Alarm (Not outdoor unit
o Communication
detected)
o Indoor 2nd DHW thermistor anomaly
Water inlet thermistor abnormally
o Indoor
(THMwi)
Water outlet thermistor abnormally
o Indoor
(THMwo)
Indoor Liquid Pipe Temp Thermistor
o Indoor
Abnormality (THMl)
Indoor Gas Pipe Temperature Thermistor
o Indoor
Abnormality (THMg)
Water Circuit 2 thermistor abnormally
(o) Indoor
(THMwo2)
Water DHW thermistor abnormally
(o) Indoor
(THMdhwt)
Auxiliary sensor 2 thermistor abnormally
(o) Indoor
(THMaux2)
Auxiliary sensor 1 thermistor abnormally
(o) Indoor
(THMaux1)
Water Plate HEX pipe thermistor
o Indoor
abnormally (THMwohp)
Auxiliary sensor 3 thermistor abnormally
(o) Indoor
(THMaux3)
Water pressure sensor (WPS)
o Indoor
abnormality
o Indoor Incorrect LCD setting
Triggered in case no YCC messages
have been received for more than
180 seconds since last message was
received.
(o) Communication
In case this alarm appears, software
stops Indoor and Outdoor operations
until communication is restored.
Hydraulic alarm flow & Water Pump
o Indoor
malfunction
o Indoor Thermostat Heater Alarm
Mixing over-temperature limit protection
o Indoor
for Mixed circuit.
Detail of Abnormality Main Factors
Loose, disconnected, broken or short-
circuited connector
Loose, disconnected, broken or short-
circuited connector
Loose, disconnected, broken or short-
circuited connector
Loose, disconnected, broken or short-
circuited connector
Loose, disconnected, broken or short-
circuited connector
Loose, disconnected, broken or short-
circuited connector
Loose, disconnected, broken or short-
circuited connector
Loose, disconnected, broken or short-
circuited connector
Loose, disconnected, broken or short-
circuited connector
Loose, disconnected, broken or short-
circuited connector
Loose, disconnected, broken or short-
circuited connector
Loose, disconnected, broken or short-
circuited connector
Loose, disconnected, broken or short-
circuited connector
Current LCD configuration does not
allow proper operation
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
Water flow is not detected in the
hydraulic cycle or Pump defective
High temperature is detected in Electric
Heater
Circuit 2 supply temperature > Target
temperature + offset