SiUS281811EA Symptom-based Troubleshooting
Part 6 Service Diagnosis 203
2.2 With Optional Infrared Presence/Floor Sensor
16 The outdoor
unit compressor
or the outdoor
fan does not
stop.
After stopping operation It stops in order to prevent oil or
refrigerant from dwelling.
Normal operation.
It stops after a lapse of
approximately 5 to 10 minutes.
17 The outdoor
unit gets hot.
While stopping operation The reason is that the
compressor is warmed up to
provide smooth startup of the
system.
Normal operation.
18 The system
does not cool
air well.
The system is in dry
operation.
The reason is that the dry
operation serves not to reduce
the room temperature where
possible.
Change the system to cooling
operation.
Problem Measure
1
"Louver operation different from setting" or "No downward
airflow in heating operation"
Refer to the flowchart below.
2
Individual airflow direction setting different from the actual
airflow direction
· Check the "Louver operation different from setting" error
diagnosis.
3 When in stop mode, the louver does not close completely. Turn off the circuit breaker and then turn it on again.
4
The remote controller menu does not display energy saving
operating mode for when people are not present.
Please check "Infrared presence/infrared floor sensor error
(CE)" in troubleshooting.
The remote controller menu does not display the stop function
for when people are not present.
The remote controller menu does not display the automatic
draft prevention function.
5
The menu does not display the eco-friendly display function. No defect.
Set the clock.
6
During cooling and dry operation, the louver automatically
switches from horizontal (P0) to one-level downward (P1).
No defect.
When relative ambient humidity is higher, automatic louver
control will be activated.
7
During heating operation, the use of an airflow block will not
cause other louvers to turn downward (P4).
No defect.
In heating operation, if an airflow block is set, then the air
outlet control outside the airflow block will be within the
range P0-P3.
8
When using airflow block, the airflow block will be routinely
lifted (become horizontal) during heating operation.
No defect.
Set louver to horizontal (P0) during thermostat OFF.
9
Although people are not present, the infrared presence sensor
detects human presence.
Check if there are any objects that generate temperature
change when moving.
For example:
· An electric heater with swing function
· Doors, curtains, blind switches
· Output of paper from a fax machine or a printer
· Turning on/off of incandescent lights
· Moving objects
10
Although people are present, the infrared presence sensor fails
to determine their presence.
Check for the following conditions.
· Lack of movement
· Facing away from the sensor
· Little skin exposed
· Slight movement in a place far from the sensor
11
Large difference between floor temperature and actual
temperature
Check for the following conditions.
· Sensor detection zone affected by solar radiation
· High or low temperature objects in the sensor detection
zone
· Large difference between floor temperature and
temperature of the living space
· Sensors installed near walls may be affected by wall
temperature.
Symptom Supposed Cause Countermeasure
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