Alarm Codes - Hitachi FSXNHE Serie Installations- Und Betriebshandbuch

Alarm codes

12 ALARM CODES
Most common alarm codes
Code Category
01 Indoor unit
02 Outdoor unit
03
04 Transmission
04.
05 Power phase
06
Voltage
06.
07
Cycle
08
0A Transmission
0b
Outdoor unit
0C
11
12
Indoor unit sensor
13
14
19 Fan motor
21
22
23
Outdoor unit
sensor
24
25
29
31
35
System
36
38
39 Compressor
71
PMML0294A_rev.2_02-2014.indb 71
Content of abnormality
Protection device activation (float switch)
Protection device activation (disconnection due to
high pressure)
Abnormality between indoor and outdoor
Abnormality between inverter PCB and outdoor
PCB
Abnormality between fan controller and outdoor
PCB
Abnormality in the power phases
Abnormal inverter voltage
Abnormal fan controller voltage
Drop in discharge gas superheat
Increase in discharge gas temperature
Abnormality between outdoor and indoor
Incorrect outdoor unit address setting
Main unit of the outdoor unit incorrectly set
Air inlet thermistor
Air outlet thermistor
Frost protection thermistor
Gas pipe thermistor
Indoor fan protection device activation
High pressure sensor
Outdoor air thermistor
Discharge gas thermistor at top of compressor
Heat exchanger liquid pipe thermistor
Heat exchanger gas pipe thermistor
Low pressure sensor
Incorrect capacity setting on outdoor and indoor
units
Indoor unit no. incorrectly set
Incorrect of indoor unit combination
Abnormality in the collection circuit for outdoor
unit protection
Abnormal operation current in constant speed
compressor
PMML0294A rev.2 - 07/2014
Possible cause
Float switch activation (high water level in drain hose or
abnormality in drain pipe, float switch or drain pan).
PSH activation (pipe clogging, excess refrigerant, mix-
ture of inert gas).
Incorrect wiring, loose terminals, disconnect cable,
blown fuse, outdoor unit switched off.
Inverter PCB - Outdoor PCB transmission fault (loose
connector, broken cable, blown fuse).
Fan controller - Outdoor PCB transmission fault (loose
connector, broken cable, blown fuse).
Incorrect power supply, inverted phase connection, open
phase.
Outdoor voltage drop, insufficient power.
Outdoor voltage drop, insufficient power.
Excessive refrigerant charge, thermistor fault, incor-
rect wiring, incorrect pipe connection, expansion valve
locked in open position (connector disconnected).
Insufficient refrigerant charge, pipe clogging, thermistor
fault, incorrect wiring, incorrect pipe connection, expan-
sion valve locked in closed position (connector discon-
nected).
Incorrect wiring, broken cable, loose terminals.
Duplicate address setting of outdoor units (secondary
units) in the same refrigerant cycle system.
Two (or more) outdoor units defined as the "main unit" in
the same refrigerant cycle system.
Incorrect wiring, disconnected wiring, broken cable,
short circuit.
Fan motor overheating, locking.
Incorrect wiring, disconnected wiring, broken cable,
short circuit.
Combination capacity incorrectly set. Excessive or insuf-
ficient total indoor unit capacity.
Indoor unit no. duplicated in same reference group.
Duplication of indoor unit number in same refrigerant
group.
Protection detection device fault (incorrect wiring of
outdoor PCB).
Overcurrent, blown fuse, current sensor fault, instant
power failure, voltage drop, abnormal power supply.
14/07/2014 12:28:40