Hitachi ECO COMPACT PC-ARC-E Installation & Operation Manual page 78

◆ Checking the current operating condition
Contents of Check 1
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Temperature Status Display
Set Temp.
1
Inlet Air
2
Temperature
Outlet Air
3
Temperature
Liquid Pipe Temp.
4
Remote Thermistor
5
Temp.
Outdoor
6
Temperature
Gas Pipe Temp.
7
Evaporating Temp.
8
at Heating
Control Information
9
Condensing Temp.
at Cooling
Comp Top Temp.
10
Thermo Temp. of
11
Wired Controller
Control Information
12
Unit Control Display
I.U.
13
Micro-Computer
O.U.
14
Micro-Computer
I.U. Control
15
Software Number
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PMEN0630 rev.0 - 07/2022
When Dual Setpoint is set, the setting temperature for
b1 22
auto mode is indicated.
EconoFresh displays the temperature of direct-acting
b2 20
expansion valve coil.
Normal
b3 55
b4 20
b5 25
b6 10
b7 25
b8 02
b9 --
b9 06
bA 41
bb 23
bC 00
C1
C2
No indication
C3
0000
If the (output) relay is not listed depending on the type of the
indoor unit, there is no indication.
Temperature Indication
- -
Thermistor is
Or
disconnected or
00
PCB is broken
Abnormal
(for "10 Comp. Top Temp." only)
Thermistor is
FF
short circuited or
PCB is broken

NOTE
During transition such as start-up, "--" may be indicated temporarily.
The value is indicated only when the remote thermistor is installed.
Otherwise "--" is indicated.
For the indoor unit with multiple thermistors for Evaporating
Temperature at Heating, the minimum temperature is indicated.
The internal information of the wired remote controller is indicated.
For multi-type indoor units, the number of running compressors is
indicated.
The inlet gas temperature is indicated.
"FF" is indicated if the temperature is above 201°C.
For the indoor unit installed with multiple compressors, the average
temperature of the running compressor is indicated.
For flexible multi-type, the value of Inverter Compressor in Unit A is
indicated.
Thermo-ON for Heating
Segments Indication
Cool Only Type Unit
Cool Heat Type Unit
Alarm
No indication
No indication
Operation
H2
Thermo-ON for Cooling Thermo-ON for Heating
Segments Indication
Tenant Type Unit
Multi-Type Unit
(except for Multi-Type Unit)
No indication
Y21
Y52C
Y20A
YCH
Outdoor Fan
Display the last 4 digits.
Wired Remote
Controller
check
connection
parts on PCB
Alarm
H2
52H
Thermo-ON
for Cooling
Y21
Y20B
1
Y52C
Y52C
2
Y21
Y20A
2
Outdoor Fan
10
64