Troubleshooting; Maintenance - Hitachi PSC-A32MN Operation Manual

10. Troubleshooting

Check the following table before contacting a dealer for maintenance.
Condition
Indications on the touchscreen are not displayed.
The touchscreen display is slept.
A part of the touchscreen is not turned ON or
is constantly turned ON.
The button on the touchscreen cannot operate
even if tapped.
The button next to the tapped button will react.
The air conditioner unit does not run.
The setting of louvre direction returns to previous
setting.
Schedule operation does not run.
"- -" is indicated for the date and time.
The setting is not changed.
The air conditioner unit does not RUN/STOP
simultaneously.
The remote control switch does not match with
the main controller, when the indoor unit is
recovering from a power failure.

11. Maintenance

• Clean and wipe the display with dry and soft cloth.
• For oil and fat on the touchscreen such as finger print marks, use diluted neutral detergent mixed with
water to clean. Before cleaning, wring water out to dry. After that, again wipe the display with dry and soft
cloth.
• Do not use benzine, thinner or surface active agent in order to protect the display from deformation or
tarnish.
46
• Check that the wiring for the power supply is connected to
the plug.
• Check that the power supply is turned ON.
• The touchscreen will automatically sleep when the
touchscreen is not operated for the given length of time.
Tap the screen to wake up.
• There may be dead pixel 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 the item 8.8 for the Touchscreen Calibration.
• Check if the air conditioner unit is in the heat storage mode.
(Simultaneous heat storage units are exception.) The air
conditioner cannot operate while the heat storage unit is
operating.
• When the operation mode is "AUTO", the direction of louvre
is automatically corrected depending on the indoor unit
model.
• Check if the holiday setting is turned ON.
If so, cancel the holiday setting according to the item 8.4.2.
• Check if the setting of schedule operation is turned OFF.
If so, the schedule operation should be turned ON according
to the item 8.4.3.
• "- -" is indicated when electrical power is shut down for a
long time.
Set the date and time again according to the item 8.6.
• When the central station is operated immediately after
turning ON the air conditioners, the central station may
not be possible to control because the starting up of the
air conditioners are prior. Wait for a certain time before
operation.
• Check if Exception Set. Run/Stop Operation is selected.
If so, cancel the setting.
• The power supply was not stable temporally when
recovering from a power failure.
Use the main controller to match with the remote control
switch.
Cause
P5415644