Johnson Controls YVAHP072B31S, Service Manual

Page: 1256 / 1796

2-336
Service Manual
OPERATION
11. Troubleshooting
Check the following table before contacting a distributor for maintenance.
Condition Cause
Details on the touchscreen are not displayed.
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The touchscreen display is in “sleep”mode.
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when there has been no interaction with it over a length of
time. Touch anywhere on the screen to awaken it.
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The operation is not carried out smoothly when
the switch is tapped.
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touchscreen may not match the position of display indication.
Refer to the item 8.7 for the Touchscreen Calibration.
The symbol “- -” is indicated for the temperature
setpoint. The temperature cannot be set.
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Press and hold “ ” or “ ” for 3 seconds on the setting
touchscreen.
Refer to Section 7.9.
The setting of louver direction returns to a
previous setting.
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louver is automatically corrected depending on the indoor
unit model.
The timer operation in the schedule setting does
not run.
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to Section 8.3.3.
The symbol “- -” displays in place of date and time.
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down over a lengthy period of time.
Set the date and time again according to the item 8.5.
The setting is not changed.
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controller may not be possible to control because the
starting up of the air conditioners are may not work because
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and try again.