Hitachi PC-ARFG-E Installation & Operation Manual page 85

SERVICE & INSTALLATION MENU

Checking the current operating condition
Contents in Check 1
Temperature Status Display
1 Set Temp.
2 Inlet air temperature
3 Outlet air temp
4 Liquid pipe temp.
5 Remote thermistor temperature
6 Outdoor temp.
7 Gas pipe temperature
8 Evaporating temp. at heating
Control information
9
Condensing temp. at cooling
10 Comp. top temperature
11 Thermo temp. of wired controller
12 Control information
Unit control display
13 I.U Micro-computer
14 O.U Micro-computer
15 I.U Control software number
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80 PMML0565 rev.0 - 09/2021
When Dual Setpoint is set, the setting temperature for auto mode is indicated.
b1 22
Normal
b2 20
Abnormal
b3 55
?
b4 20
During transition such as start-up, "--" may be
indicated temporarily.
The value is indicated only when the remote thermistor is installed. Otherwise
b5 25
"--" is indicated.
b6 10
b7 25
For the indoor unit with multiple thermistors for Evaporating Temperature at
b8 02
Heating, the minimum temperature is indicated.
The internal information of the wired remote controller is indicated. For multi-
b9 --
type indoor units, the number of running compressors is indicated.
The inlet gas temperature is indicated.
b9 06
"FF" is indicated if the temperature is above 201ºC. For the indoor unit
bA 41
installed with multiple compressors, the average temperature of the running
compressor is indicated.
bb 23
For flexible multi-type, the value of Inverter Compressor in Unit A is indicated.
bC 00
No Indication
C1

C2
-
C3 0000
Tenant type unit (except for multi-
No Indication
?
N O T E
If the (output) relay is not listed depending on the type of the indoor unit, there
is no indication.
Temperature indication
--
Thermistor is disconnected
Or
or PCB is broken
00
(for "10 Comp. top temp." only)
FF
Thermistor is short
N O T E
circuited or PCB is broken
Segments Indication
Cool only type unit
No Indication
Alarm

Operation
H2
Thermo-ON
for Cooling
Segments Indication
type unit)
Y21

Y52C
Y20A
YCH
Outdoor fan
Wired
remote
controller
checks
connection
parts on
PCB
Cool heat type unit
Alarm

H2
Thermo-ON
for Heating
52H
Thermo-ON
for Cooling
Multi-type unit
Y21
No Indication
1
Y20B

Y52C
Y52C
2
Y21
2
Y20A
Outdoor fan