Hitachi YUTAKI S80 Series - Alarm Codes

13. Troubleshooting
TCGB0075 rev.0 - 11/2012
153
13
13.1.2 Alarm codes
LCD dis-
play
7 segment
display
Origin Detail of abnormality Main factors
02 02
Outdoor
Activation of outdoor unit protection device
(Except for alarm code 42)
High pressure interrupting device activated
03 03
Outdoor -
1st cycle
Transmission error
Outdoor fuse meltdown, Indoor/outdoor con-
nection wiring (breaking, wiring error, etc.)
04 04
Outdoor Inverter transmission abnormality
Control PCB – Inverter PCB connection wiring
(breaking, wiring error, etc.)
05 05
Outdoor Power phase detection abnormality Power source wiring open phase in indoor units
06 06
Outdoor Undervoltage, overvoltage
Outdoor PCB abnormality, inverter PCB abnor-
mality, DM, CB abnormality
07 07
Outdoor
Abnormal decrease of discharge gas super-
heat degree
Excessive refrigerant, expansion valve open-
locked, fan motor locked
08 08
Outdoor Compressor-Top temperature over-increase
Shortage or leakage of refrigerant, piping clog-
ging, fan motor lock
11 11
Hydraulic
Water inlet thermistor abnormally (THM
WI
)
Loose, disconnected, broken or short-circuited
connector
12 12
Hydraulic
Water outlet thermistor abnormally (THM
WO
)
Loose, disconnected, broken or short-circuited
connector
13 13
1st cycle
Indoor liquid pipe temperature thermistor
abnormality (THM
L
)
Loose, disconnected, broken or short-circuited
connector
14 14
1st cycle
Indoor gas pipe temperature thermistor ab-
normality (THM
G
)
Loose, disconnected, broken or short-circuited
connector
15 15
1st cycle
Water outlet C2 thermistor abnormally
(THM
WO2
)
Loose, disconnected, broken or short-circuited
connector
16 16
1st cycle
Water DHWT thermistor abnormally (THM
D-
HWT
)
Loose, disconnected, broken or short-circuited
connector
17 17
1st cycle
Water swimming pool thermistor abnormally
(THM
SWP
)
Loose, disconnected, broken or short-circuited
connector
18 18
1st cycle
Water outlet 3 thermistor abnormally
(THM
WO3
)
Loose, disconnected, broken or short-circuited
connector
20 20
Outdoor
Compressor-Top temperature thermistor
abnormality
Loose, disconnected, broken or short-circuited
connector
21 21
1st cycle
2nd ambient thermistor abnormally (TH-
M
AMB2
)
Loose, disconnected, broken or short-circuited
connector
22 22
Outdoor Outdoor temperature thermistor abnormality
Loose, disconnected, broken or short-circuited
connector
24 24
Outdoor
Outdoor heat exchanger liquid pipe thermis-
tor abnormality
Loose, disconnected, broken or short-circuited
connector
31 31
Outdoor Indoor/Outdoor combination setting error
Outdoor/Indoor unit capacity setting error, indo-
or total capacity excessively large/small
35 35
Outdoor Indoor unit number setting error
Indoor units with the same number exist in a
refrigerant piping system
38 38
Outdoor
Outdoor protection detection circuit abnor-
mality
Outdoor PCB abnormality, error in wiring to
outdoor PCB
41 41
Outdoor Pump down overload
Outdoor heat exchanger clogging/short circuit,
broken outdoor fan
42 42
Outdoor Heating overload
Outdoor heat exchanger clogging/short circuit,
expansion valve close-locked
47 47
Outdoor
Suction pressure decrease prevention acti-
vated
Shortage or leakage of refrigerant, piping clog-
ging, expansion valve close-locked, fan motor
locked
48 48
Outdoor Overload operation protection activation
Cycle abnormality, Inverter PCB abnormality,
DM abnormality, heat exchanger clogging, etc.
51 51
Outdoor Inverter current sensor abnormality
Error in CT wiring, outdoor PCB abnormality,
Inverter PCB abnormality
53 53
Outdoor Inverter module error
Compressor, ISPM abnormality, heat exchan-
ger clogging, etc.
54 54
Outdoor Inverter n temperature abnormality
Fin thermistor abnormality, heat exchanger
clogging, fan motor abnormality
55 55
Outdoor Inverter non-operation Inverter not operating or broken