Hitachi YUTAKI Series - Troubleshooting

ENGLISH
9 TROUBLESHOOTING
? NOTE
• (o): Option congurable from Unit controller. This alarm will be displayed if the system has been congured.
• 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/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
TROUBLESHOOTING
PMML0510 rev.1 - 10/2019
145