Hitachi Outdoor Unit 7 Segment Display Interrogation

Hitachi Outdoor Unit 7 Segment Display Interrogation
Technical Bulletin
Number
Subject
Date
097
Hitachi Outdoor Unit 7Seg Display
Interrogation
25 March 2014
This is a step-by-step guide to Interrogating Hitachi Outdoor units
(Set Free VRF/Utopia/IVX) via the 7 Segment Display.
This interrogation can be carried out at any time, during normal or test run
operation, this also includes reading data off all connected indoor units.
To start the viewing system information from the outdoor unit, hold the
PSW2 button for 3 seconds, the display should light up or change from
current display.
To progress through the information, gently press PSW2 to read first, the
codes in the lists below, then the value. If at any time you go too far, or if the
data you wish to read is at the end of this list, PSW3 goes in the opposite
direction to PSW2.
Once finished, push and hold PSW2 as before to clear screen. Note that
operation will continue regardless
Listed below are tables with different readings for Set-Free VRF, Utopia Splits
and IVX systems. Some of the data is common and will be relevant for these
and other systems such as new FSXN and FSXNH (2013 Models)
Technical Bulletin
Set-Free VRF systems (pre FSXN):
Total thermo-ON indoor unit capacity (Divide by 8 to
get HP)
oP
Frequency of inverter compressor MC1 (Hz)
Number of running compressors (0% = 0 to 100% =
16)
H1
Airflow rate
Fo
CC
Outdoor expansion valve MV1 opening %
oE1
Outdoor expansion valve MV2 opening %
oE2
Outdoor expansion valve MV3 opening %
oE3
Outdoor expansion valve MVB opening %
oEb
Discharge pressure (high) (MPa) (Bar = X10)
Pd
Suction pressure (low) (MPa) (Bar = X10)
Discharge gas temp. on compressor (TD1) °C
PS
rd1
Discharge gas temp. on compressor (TD2) °C
rd2
Discharge gas temp. on compressor (TD3) °C
rd3
Discharge gas temp. on compressor (TD4) °C
rd4
Discharge gas temp. on compressor (TD5) °C
rd5
Discharge gas temp. on compressor (TD6) °C
rd6
Evaporating temperature 1 in heating °C
rE1
Evaporating temperature 2 in heating °C
rE2
Evaporating temperature 3 in heating °C
rE3
Air temperature (TO) °C
ro
Reserve
Running current of compressor MC1 (amps)
rCH
Running current of compressor MC2 (amps)
A2
Running current of compressor MC3 (amps)
A3
Running current of compressor MC4 (amps)
A4
Running current of compressor MC5 (amps)
A5
Running current of compressor MC6 (amps)
A6
A1
The following will scroll through each indoor unit
value, it will be prefixed by the refrigeration number
of the system.
eg ( 01 ie 01) then ( 01 ie 02) 01 being Refrigeration
number 01 & 02 being Indoor address.
Indoor addresses are 0-9,A,B,C,D,E,F, (16 Max.)
Indoor unit expansion valve opening %
Indoor unit liquid pipe temp (freeze protection)
-- ie --- rL --
Technical Bulletin
Indoor unit heat exchanger gas pipe temp
-- r8 --
Indoor unit air inlet temperature
-- ri --
Indoor unit discharge air temperature
-- ro --
Indoor Unit Capacity Setting (1/8HP)
-- ca --
Indoor unit cause of stoppage
-- d1--
Pressure ratio decrease protection restricted control
c11
High pressure increase protection restricted control
Inverter final temperature increase protection
restricted control
Discharge gas temp decrease protection restricted
control
Discharge gas temp decrease protection restricted
control
c13
Current protection restricted control
c17
Total accumulated hours of compressor MC1 ( X 10)
Uj1
Total accumulated hours of compressor MC2 ( X 10)
Uj2
Total accumulated hours of compressor MC3 ( X 10)
Uj3
Total accumulated hours of compressor MC4 ( X 10)
Uj4
Total accumulated hours of compressor MC5 ( X 10)
Uj5
Total accumulated hours of compressor MC6 ( X 10)
Uj6
The latest cause code of stoppage at outdoor unit
AC
Cause code of stoppage at inverter
irC
Cause code of stoppage at fan motor controller
FrC
Total capacity setting of indoor unit (1/8HP)
CP
Total quantity of combined indoor unit
AA
Address of refrigerant system
GA
c14
c15
c16
Technical Bulletin
Utopia and IVX systems
The process is exactly the same as the above, although the data available is
slightly less comprehensive. The following list itemises the typical information
that be scrolled through:
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