Hitachi RAS-(4-12)HNP(1)(E) - Indication of Micro-Computer Input;Output; Indication of Unit Stoppage Cause

8 Troubleshooting
279
SMGB0087 rev.0 - 12/2013
8
Indication of micro-computer input/output
12
Micro-computer input/output in
indoor unit
C1 
H2
52H
Y52C2
Y212
Y211
Y52C1
Y20B
Y20A
Heating Thermo-ON
Cooling Thermo-ON
Dark
Alarm
Outdoor fan
Dark
13
Micro-computer input/output in
outdoor unit
C2 -
Indication of unit stoppage cause
14 Cause of stoppage
d1 01
00
Operation OFF, Power OFF
N O T E 1
Explanation of term,
Thermo-ON: A condition that an indoor unit is reques-
ting compressor to operate.
Thermo-OFF: A condition that an indoor unit is not re-
questing compressor to operate.
N O T E 2
Even if stoppage is caused by “Alarm”, “02” is not
always indicated.
N O T E 3
If transmission between the inverter printed circuit
board and the control printed circuit board is not per-
formed during 30 seconds, the outdoor unit is stopped.
In this case, stoppage is d1-05 cause and the alarm
code “04” may be indicated.
N O T E 4
If transmission between the indoor unit and the outdo-
or unit is not performed during 3 minutes, indoor units
are stopped.
In this case, stoppage is d1-06 cause and the alarm
code “03” may be indicated.
01
Thermo-OFF (NOTE 1)
02
Alarm (NOTE 2)
03
Freeze protection overheating protection
05
Instantaneous power failure at outdoor unit (NOTE 3)
06
Instantaneous power failure at indoor unit (NOTE 4)
07
Stoppage of Cooling Operation due to Low Outdoor Air Tempera-
ture
Stoppage of Heating Operation due to High Outdoor Air Tempera-
ture
10
Demand
11
Retry due to compression ratio decrease
12
Retry due to low pressure increase
13
Retry for Pd increase prevention
15
Vacuum/discharge gas temperature increase retry
16
Retry due to discharge gas SUPERHEAT decrease
17
IPM error retry, instantaneous over current of inverter retry, elec-
tronic thermal activation of inverter retry, abnormal current sensor
of inverter retry
18
Retry due to inverter voltage decrease
Retry due to Inverter Overvoltage
Retry due to inverter transmission abnormality
19
Retry due to Expansion Valve Control
21
Forced Thermo-OFF
22
Outdoor hot start control
24
Thermo-OFF during energy saving operation mode
26
Retry due to high pressure decrease
28
Cooling air discharge temperature decrease
33
Forced Thermo-OFF (example: due to Air Filter Cleaning)
34
Forced Thermo-OFF (example: due to Motion Sensor
35
Retry due to abnormal operating mode
(Reversing valve switching failure)
39
Forced Thermo-OFF due to Power Saving Control)