Troubleshooting; This Is Not Abnormal - Hitachi RPC-5.0FSR Operation Manual

14. Troubleshooting

14.1 This is Not Abnormal
Phenomenon
Operation Stopped
White Steam
from Indoor Unit
White Smoke
from Indoor Unit
Mist from Indoor Unit
Odor from Indoor Unit
Sound from Indoor Unit
Dew Condensation on
Indoor Unit
Temperature Irregularity
"HOT-START" or "Preheating" on LCD Turned ON
Operation Mode on LCD Flashing
A10762290A
All indication lamps on the
wired controller are turned
OFF.
"Motion Sensor ON" is turned
ON on the wired controller.
After Power Failure
During Heating Operation
At Beginning of Heating
Operation Season
In Restaurant or Kitchen
During Dry Operation
During Cooling Operation
in Humid Environment
During FrostWash
Odor Discharged Air from
Indoor Unit
Grate is heard when starting
or stopping the operation.
Sound of water flowing or
burbling is heard during the
operation.
Growling sound may be heard
temporarily right after the air
flow volume is changed.
Crackling sound or sound
of frost melting during
FrostWash.
Dew condensation on
Air Inlet Grille or Cabinet or
Dew Drops
Dew condensation on
Air Inlet Grille or Cabinet
during or after FrostWash
The air flow volume and
temperature of each air outlet
are irregular.
Cause and Action
The micro-computer is activated to protect the
device from electromagnetic waves. Restart the
operation.
The operation is stopped automatically because
the motion sensor is set as "If absent: OFF" and
it detects as absence for a period of time. (All the
indoor units connected to the same wired controller
are stopped.)
Restart the operation. If the instantaneous power
failure is within 2 seconds, the operation restarts
automatically.
This might occur during the defrosting operation in
the heating operation.
This might occur when dust attached to the heat
exchanger has been dried.
This might occur when oil attached to the fins might
decrease the heat exchange efficiency.
This might occur when the air outlet temperature
becomes lower. Change the operation mode.
This might occur when the air outlet temperature
becomes lower.
Raise the set temperature and the air flow volume.
This might occur when frost is formed on the fins of
the heat exchanger.
This might occur when the smell of cigarette smoke
or room stuck to the inside of the indoor unit.
Ventilate the unit well in the fan mode and clean the
air filter, the air outlet and the air inlet grille.
This is the sound made when the components are
rubbing against each other due to the extension
and contraction of the resin parts caused by the
temperature change.
This is the sound made when the refrigerant flows
or the drain-up mechanism drains water. The sound
may be heard especially when starting the operation
or stopping the compressor (for approx. 3 minutes).
It is generated because the fan motor makes
temporary sound by change of fan speed.
This is the sound of the heat exchanger fins freezing
and thawing and the sound of resin parts extension
and contraction due to changes in temperature.
This might occur when the operation is performed in
humid place (relative humidity is approx. 80%) for a
long time.
This might occur when the operation is performed in
humid place (relative humidity is approx. 80%) and
high temperature place (higher than 30
This might occur for structural reasons, such as the
size of air outlet and the location of heat exchanger.
This might occur according to the operation mode
or operation conditions.
o
C).
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