Alarm Codes - Hitachi YUTAKI S80 Series Technical Catalogue

13. Troubleshooting

13.1.2 Alarm codes

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