Troubleshooting - Fujitsu UTY-RVN*M Operating Manual

8-2. Troubleshooting

In the event of a malfunction (burning smell, etc.), immediately stop operation, turn off the electrical breaker and consult
authorized service personnel.
Merely turning off the unit's power switch will not completely disconnect the unit from the power source. Always be sure to turn
off the electrical breaker to ensure that power is completely off.
Before requesting service, perform the following checks:
CHECK ONCE Does not operate at all:
MORE
Following functions
cannot be set:
•Economy
•Set temp. auto return
• Set temp. range limita-
tion
•On timer
•Off timer
•Weekly timer
•Auto-off timer
On timer or Off timer
does not work:
Operation is automati-
cally stopped:
Operation does not
stopped even if auto-off
timer has been set:
Set temperature is
changed automatically:
Does not return to the set
temperature:
Set temperature cannot
be changed:
NORMAL Airflow is stopped and
FUNCTION
icon display of the "Moni-
tor" screen:
Symptom
• Has the circuit breaker been turned off?
• Has there been a power failure?
• Has a fuse blown out, or a circuit breaker been tripped?
Is the timer operating?
Is key lock enabled?
If the function you are selecting is restricted by [Management] function,
following message is displayed in the operation guidance display.
Has the function setting been set to [Enable] or [On]?
Has there been a power outage? Any power outage cancels the On or
Off timer.
After the power supply is resumed, set the [Enable/Disable setting] to
[Enable] again.
Has off timer been set?
Has weekly timer been set?
Has auto-off timer been set?
Has the operation been started by pressing the [On/Off button] on this
remote controller?
Has the operation been started by weekly timer or on timer?
Has the weekly timer been on during the counting down of the Auto-off
timer?
Has it been within the valid hour?
Has there been a power outage? Any power outage cancels the Auto-off
timer.
Is message [R.C. prohition (All, on/off)] and
Has set temp. auto return been set?
Has set temp. range limitation been set?
Has set temp. range limitation been set?
Is message [R.C. prohition (Set temp. all)] and
Airflow is stopped due to the automatic defrosting, oil recovery, or
mode mismatch. Refer to the operating manual of the relevant indoor
is displayed on the
unit.
WARNING
Items to check
Back: Restricted by the management function
XXXXXX XXXXXX
icon displayed?
icon displayed?
See
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