Unit installation

8
2. Guide for Operation Condition
Inspection item Result
Power supply
Loose con- nection
Breaker Good Retightened
Terminal block Outdoor Unit Good Retightened
Indoor Unit Good Retightened
(Insulation resistance) M
(Voltage) V
Accumulated operating time Time
Number of ON/OFF times Times
Current A
Refrigerant/heat exchanger temperature COOL °C HEAT °C
Refrigerant/discharge temperature COOL °C HEAT °C
Air/outside air temperature COOL °C HEAT °C
(Air/discharge temperature) COOL °C HEAT °C
Appearance Good
Cleaning required
Heat exchanger Good Cleaning required
Sound/vibration None Present
Air/Room air temperature COOL °C HEAT °C
(Air/discharge temperature) COOL °C HEAT °C
Refrigerant/heat exchanger temperature COOL °C HEAT °C
Filter operating time* Time
Decorative panel Good
Cleaning required
Filter Good Cleaning required
Fan Good Cleaning required
Heat exchanger Good Cleaning required
Sound/vibration None Present
Com-
pressor
Temperature
Cleanli- ness
Outdoor Unit
Temperature
Cleanliness
Indoor Unit
* The filter operating time is the time that has elapsed since the filter was reset.
Check Points
Enter the temperature differences between , , and into
the graph given below.
Operation state is determined according to the plotted areas on
the graph.
For data measurements, set the fan speed to "Hi" before activat-
ing maintenance mode.
Is "000" displayed stably in Display
on the remote controller?
Is "000" displayed stably in Display
D
on the remote controller?
( Discharge temperature) - ( Outdoor
heat exchanger temperature)
( Indoor room temperature) - (
Indoor heat exchanger temperature)
( Discharge temperature) - ( Indoor
heat exchanger temperature)
( Indoor heat exchanger temperature) -
( Indoor room temperature)
Cool
Classification Item Result
Inspection
Temperature
difference
Heat
Inspection
Temperature
difference
Stable Unstable
°C
°C
Stable Unstable
°C
°C
* Fixed Hz operation may not be possible under the following tempera-
ture ranges.
A)In cool mode, outdoor intake air temperature is 40 °C or higher or
indoor room temperature is 23 °C or lower
B)In heat mode, outdoor intake air temperature is 20
°C or higher or
indoor room temperature is 25
°C or lower
* If the air conditioner is operated at a temperature range other than the
ones above but operation is not stabilized after 30 minutes or more have
elapsed, carry out inspection.
* In heat mode, the operation state may vary due to frost forming on the
outdoor heat exchanger.
°C
45
40
35
30
25
20
15
10
5
0
10 20 30 40 50 60 70 80
Normal
Filter inspection
Inspection C
Inspection A
Inspection B
°C
45
40
35
30
25
20
15
10
5
°C°C
Normal
Filter inspection
Inspection C
Inspection A
Inspection B
Cool mode Heat mode
( Indoor room temperature) - ( Indoor heat exchanger temperature) ( Indoor heat exchanger temperature) - ( Indoor room temperature)
[ Discharge temperature] -- [ Outdoor
heat exchanger temperature]
[ Discharge temperature] - [ Indoor
heat exchanger temperature]
Result
Normal operation state
Filter may be clogged. *1
Performance has dropped. Detailed in-
spection is necessary.
Refrigerant amount is dropping.
Filter or indoor heat exchanger may be
clogged.
Area Check item
Judgment
Cool Heat
Normal
Filter inspection
Inspection A
Inspection B
Inspection C
* The above judgement is just guide based on Japanese standard
conditions.
It may be changed depending on the indoor and outdoor temperature.
10 20 30 40 50 60 70 80
*1 If may be judged as "Filter inspection" due to the outdoor and indoor
temperature, even though it is not clogged.