Indoor Unit - Hitachi YUTAMPO Series Service Manual

6 Troubleshooting

Indoor unit

6.2 Indoor unit

Alarms through PC-ARFTE
Outdoor
Alarm Protection unit LED301
code code Blinking
times
03 -
16 -
71 -
80 -
102 P102 2 times
103 P103 3 times
104 P104 4 times
105 P105 5 times
-- P106 6 times
107 P107 7 times
-- P109 9 times
-- P110 10 times
-- P111 11 times
112 P112 12 times
113 P113 13 times
114 P114 14 times
115 P115 15 times
-- P116 16 times
204 -
205 -
70 SMGB0135 rev.0 - 06/2020
Category Type of abnormality
Transmission Alarm (Not
Indoor
outdoor unit detected)
DHW tank thermistor
Indoor
abnormally (THM
Tank over-temperature limit
Indoor
protection
LCD controller transmission
Indoor
error
Outdoor unit LCD controller has no power
Abnormal Low Speed of the
Outdoor unit
Compressor
Compressor Changeover
Outdoor unit
Failure (Switching Failure)
Lower Limit of Compressor
Outdoor unit
Overload
Stoppage by OH Thermistor
Outdoor unit
High Temperature
Thermistor Failure: Thermistor
Outdoor unit
disconnection short circuit
Stoppage by Transmission
Outdoor unit
Error, communication error
Outdoor unit Power Supply Voltage Error
Outdoor unit Fan abnormality 1
Outdoor unit Fan lock, Fan abnormality 2
Outdoor unit EEPROM Error
Outdoor unit Overvoltage abnormality
Outdoor unit Circuit abnormality
Outdoor unit Software Ip cut stop
Indoor unit stops answering to
LCD
PC-ARFTE
Central Alarm, no Central
LCD
message
Main cause
Loose, disconnected, broken or short-
circuited connector.
Loose, disconnected, broken or short-
) circuited connector.
DHWT
Failure of control relay.
No H-link communication for a continuous
period of 90 seconds between Indoor and
LCD User control by connection wiring
(breaking, wiring error, etc.).
Power supply problem or incorrect wiring.
Failure of compressor or PCB.
Pipe clogging, excessive refrigerant, innert
gas mixing, fan motor locking at cooling
operation.
Failure of compressor or PCB.
Failure of compressor or PCB.
Failure of compressor or PCB.
Incorrect wiring, disconnected wiring,
broken cable, sensor failure.
Pipe clogging, excessive refrigerant, innert
gas mixing, fan motor locking at cooling
operation.
Incorrect wiring, disconnected wiring,
broken cable, sensor failure.
Incorrect or disconnected wiring.
PCB failure.
Power supply problem or incorrect wiring.
Failure of compressor or PCB.
Failure of fan motor.
Failure of PCB.
Failure of fan motor.
Failure of PCB.
Failure of PCB.
Power supply problem or incorrect wiring.
Failure of compressor or PCB.
Failure of PCB.
Failure of compressor or PCB.
Loose, disconnected, broken or short-
circuited connector.
Loose, disconnected, broken or short-
circuited connector.