Hitachi YUTAKI S COMBI RWD-4.0NWE-260S - 9 Troubleshooting

ENGLISH
9 TROUBLESHOOTING
Alarm code indication on remote control switch:
Alarm indication
Alarm code

Alarms for Indoor units:
Alarm
Code
Retry
Stop
Code
Yutaki
S/SC
Yutaki
S80
Yutaki
M
Origin Detail of Abnormality Main Factors
3 - o o o Communication
Transmission Alarm (Not outdoor
unit detected)
Loose, disconnected, broken or
short-circuited connector
11 - o o o Indoor
Water inlet thermistor abnormally
(THMwi)
Loose, disconnected, broken or
short-circuited connector
12 - o o o Indoor
Water outlet thermistor abnormally
(THMwo)
Loose, disconnected, broken or
short-circuited connector
13 – o o o Indoor
Indoor Liquid Pipe Temp Thermistor
Abnormality (THMl)
Loose, disconnected, broken or
short-circuited connector
14 – o o o Indoor
Indoor Gas Pipe Temperature
Thermistor Abnormality (THMg)
Loose, disconnected, broken or
short-circuited connector
15 - (o) (o) (o) Indoor
Water Circuit 2 thermistor
abnormally (THMwo2)
Loose, disconnected, broken or
short-circuited connector
16 - (o) (o) (o) Indoor
Water DHW thermistor abnormally
(THMdhwt)
Loose, disconnected, broken or
short-circuited connector
17 - (o) (o) (o) Indoor
Auxiliary sensor 2 thermistor
abnormally (THMaux2)
Loose, disconnected, broken or
short-circuited connector
18 - (o) (o) (o) Indoor
Auxiliary sensor 1 thermistor
abnormally (THMaux1)
Loose, disconnected, broken or
short-circuited connector
19 - o - - Indoor
Water Plate HEX pipe thermistor
abnormally (THMwohp)
Loose, disconnected, broken or
short-circuited connector
19 - o - Indoor
Suction R134a pipe thermistor
abnormally (THMs)
Loose, disconnected, broken or
short-circuited connector
23 - o - Indoor
Discharge R134a pipe thermistor
abnormally (THMd)
Loose, disconnected, broken or
short-circuited connector
25 - (o) (o) (o) Indoor
Auxiliary sensor 3 thermistor
abnormally (THMaux3)
Loose, disconnected, broken or
short-circuited connector
40 - o o o Indoor Incorrect LCD setting
Current LCD conguration does not
allow proper operation
63 - (o) (o) (o) Communication
Transmission error between
Central and indoor communication
Indoor fuse meltdown, Indoor/
central connection wiring (breaking,
wiring error, etc.)
70 P70 o o o Indoor
Hydraulic alarm ow & Water Pump
malfunction
Water ow is not detected in the
hydraulic cycle or Pump defective
83 P83 o o o Indoor Hydraulic alarm pressure
Water pressure is not detected in
the hydraulic cycle
72 o - - Indoor Thermostat Heater Alarm
High temperature is detected in
Electric Heater
73 o o o Indoor
Mixing over-temperature limit
protection for Mixed circuit.
Circuit 2 supply temperature >
Target temperature + offset
74 P74 o o o Indoor
Unit over-temperature limit
protection
Two > Tmax +5K
TROUBLESHOOTING
PMML0335A rev.1 - 04/2016
171