Troubleshooting - Hitachi YUTAKI Serie Installations- Und Betriebshandbuch

TROUBLESHOOTING

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