Hitachi RASC-10HNPE, Руководство по обслуживанию, Страница: 199 / 306

10 Troubleshooting
Initial troubleshooting
SMGB0091 rev.2 - 11/2015 189
10
Phenomenon Cause Check item
Action
(Turn OFF the main switch)
The compressor does not
stop or start even if the
setting temperature on the
LCD changes to *3)
Failure of air
inlet thermistor
Failure of
thermistor
Check it by self-checking *1)
Replace or correctly connect
the wires if abnormal operation
exists
Disconnec tion of
thermistor
Abnormal operation of the remote
control switch cord
Failure of the indoor unit PCB
Check PCB using the self-
check mode *2)
Replace PCB if it failed
Incorrect optional setting
Check the setting condition of
“remote control thermostat”
using the optional setting.
Setting and control:
“00”: Control using the
indoor thermistor for the
suction air.
“01”: Control using the
thermostat of the
remote control switch.
“02”: Control using the
average value of the
indoor thermistor for
the suction air and
the thermostat of the
remote control switch.
If the thermostat of the remote
control switch is not used, set
at “00”
Incorrect input/output setting
Check setting condition of
“i1” and “i2” by input/output
setting.
* Setting and control:
“01”: Room thermostat
(
c
ooling)
“02”: Room thermostat
(
h
eating)
In case that room thermostat
is not used, set for input signal
actually used. If no signal is
used, set at “00”
?
N O T E
*1): Refer to section “Self-checking procedure of the remote control switch” .
*2): Refer to section “Self-checking procedure of PCB by means of the remote control switch” .
*3): Even if the remote control switches are normal, the compressor does not operate under the following conditions:
1 Indoor temperature is lower than 21°C or outdoor temperature is lower than -5°C during the cooling process (DB).
2 Indoor temperature is higher than 27°C (DB) or outdoor temperature is higher than 15°C (WB) during the heating process.
3 When a cooling (or heating) process signal is given to the RASC unit and a different mode as heating (or cooling) process
signal is given to the indoor units.
4 When an emergency stop signal is given to RASC unit.
Air flow volume “HH2” is
not indicated on the remote
control switch.
(Depending on indoor unit
model)
Incorrect remote control switch
model
Check that remote control
switch or transition wiring
for remote control switch is
directly connected to indoor
unit(s) with “HH2” Air flow
volume function
Connect remote control switch
or transition wiring for remote
control switch to indoor unit(s)
with “HH2” air flow volume
function if necessary