Troubleshooting; Maintenance - Hitachi PSC-A32MN Installation And Operation Manual

Troubleshooting

6 TROUBLESHOOTING
Check the following table before contacting a dealer for assistance.
Indications on the touchscreen are not displayed.
The touchscreen display is in sleep mode.
A part of the touchscreen does not turn ON or is always
turned ON.
There is no response when tapping a button on the
touchscreen. However, the button next to the tapped
one is responding.
The air conditioner unit does not run.
The setting of louvre direction returns to previous
setting.
Scheduled operation does not work.
Date and time appear as "- -".
The selected settings are not applied.
Simultaneous Run/Stop of all the units does not work.
The state of the remote control switch does not match
with the state of this controller when the indoor unit is
recovering from a power failure.

7 MAINTENANCE

Clean and wipe the LCD screen with a dry soft cloth.
cloth before cleaning. After that, wipe the LCD screen again with a dry soft cloth.
deterioration or tarnishing.
PMML0332A rev.0 - 05/2015
Check that the wiring for the power supply is connected to the wall plug.
Check that the power supply is turned ON.
The touchscreen enters in sleep mode automatically when the touchscreen is not
operated for a given length of time. Tap the screen to wake it up.
There may be dead pixels on the LCD. This is not faulty.
When the central station is used for a long time, the touchscreen may not match the
position of display indication.
Refer to section
touchscreen.
Check if the air conditioner unit is in heat storage mode. The air conditioner cannot
operate while the heat storage unit is operating (with the exception of heat storage
units which explicitly allow simultaneous operation).
When the operation mode is "AUTO", the direction of the louvre is automatically
corrected depending on the indoor unit model.
Check if the holiday setting is turned ON.
If so, cancel the holiday setting following the instructions of section
.
Check if the setting of scheduled operation is turned OFF.
If so, the scheduled operation should be turned ON following the instructions of
section
Date and time appear as "- -" when the electrical power is suspended for a prolonged
period. Set date and time again following the instructions of section
.
It may happen that the air conditioners do not respond to the orders of the central
station immediately after power ON, because the starting process of the air
conditioners has priority. Wait for a brief time before attempting operation again.
Check if exception settings for Run/Stop operation are being selected. If so, cancel
the settings.
There is the possibility that the power supply was not stable when recovering from a
power failure. Perform control operation from this controller to make the state of the
remote control switch to match.
Cause
for the calibration of the
.