Hitachi RPC-2.0FSR Installation & Maintenance Manual page 50

Code
Category
No.
Activation of a protection device
01 Indoor Unit
(Float switch)
Activation of protection device;
02 Outdoor Unit
(Except for Alarm Code: 41, 42)
Communication failure between
03 Communication
indoor and outdoor units
04-09 Problem with the outdoor unit; (Refer to the "Installation and Maintenance Manual" for outdoor units.)
11 Inlet Air Thermistor failure
12 Outlet Air Thermistor failure
Sensor on
Indoor Unit
13 Freeze Protection Thermistor failure
14 Gas Piping Thermistor failure
19 Fan Motor Problem with Indoor Fan
20-29 Problem with the outdoor unit; (Refer to the "Installation and Maintenance Manual" for outdoor units.)
Incorrect capacity setting for indoor
31
and outdoor units.
Incorrect setting of other indoor unit
32
number
System
35 Incorrect setting of indoor
36 Incorrect indoor unit combination
38-59 Problem with the outdoor unit; (Refer to the "Installation and Maintenance Manual" for the outdoor unit.)
b0 Incorrect setting for unit capacity
Incorrect setting of unit and
b1
System
refrigerant cycle number
Incorrect setting of indoor unit
b5
number for H-LINK type
EE Compressor Compressor protection alarm
● When the indicator "
unit and the wired controller (loose connector, disconnected or incorrect wiring, or a severed connection).
● The indication of the alarm code "EE" means serious abnormality to burn out the compressor.
● In the case of the incorrect transmission wiring between indoor units for the twin and the triple combination,
the following failure will occur during the test run. Recheck the connection of the transmission between
indoor units and reconnect wirings correctly.
Failure: The transmission error is NOT indicated on the wired controller. No.1 indoor unit will be operated.
However, other indoor units (No.2 and No.3) will NOT be operated.
Refer to "Installation & Maintenance Manual" of the outdoor unit connected to the indoor unit.
For UTOPIA Series: In the case of the twin, triple and quad combination, check the air flow temperature of
each indoor unit. If there is a large difference in the air flow temperature between the main unit and sub
unit(s) (cooling: more than approx. 10deg., heating: more than approx. 20deg.), there may be a failure in
the refrigerant piping work. Thus, recheck the refrigerant piping.
Do NOT operate the air conditioning just to run checks on electrical wiring until preparations for the Test Run
phase is completed.
44
Alarm (Troubleshooting) Code Table
Nature of Problem
" flashes every four seconds, there is a communication failure between the indoor
NOTICE
Likely Cause
Activation of the float switch; (High water level present in
the drain pan.) A problem exists in the piping.
High Pressure Cut; (R410A: (4.15MPa)), fan motor lockup
during the outdoor unit cooling operation.
Incorrect wiring, loose terminals, disconnected wiring or a
blown fuse.
Loosely connected, disconnected, or a severed
connection.
Fan motor lockup, fan motor protection control device for
indoor unit activated.
Incorrect capacity code setting for combination, excessive
or insufficient total indoor unit capacity code.
Problem with a different Indoor Unit in the same refrigerant
cycle; (Failure at the power supply, defective PCB).
Indoor unit number duplicated in same refrigerant group.
Indoor unit is designed for other refrigerant; (R22 or
R407C).
Incorrect setting for unit capacity
Unit number or refrigerant cycle > 64
Interconnected indoor units are not supporting
H-LINK II > 17
This alarm code displays when the alarms such as
damage to the compressor occur three times within a six
hour period.
A10762300A-rev.1