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87
11-2.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
1 Accumulated operating time Time
2 Number of ON/OFF times Times
3 Current A
4
Refrigerant/heat exchanger temperature
COOL ˚F HEAT ˚F
5
Refrigerant/discharge temperature
COOL ˚F HEAT ˚F
6 Air/outside air temperature COOL ˚F HEAT ˚F
(Air/discharge temperature) COOL ˚F HEAT ˚F
Appearance Good
Cleaning required
Heat exchanger Good
Cleaning required
Sound/vibration None Present
Air/intake air temperature COOL ˚F HEAT ˚F
(Air/discharge temperature) COOL ˚F HEAT ˚F
8
7
9
Refrigerant/heat exchanger temperature
COOL ˚F HEAT ˚F
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 5, 4, 7 and 8 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 D
on the remote controller?
Is "000" displayed stably in Display
D
on the remote controller?
(
5 Discharge temperature) – (4 Outdoor
heat exchanger temperature)
(
7 Indoor intake air temperature) – (8
Indoor heat exchanger temperature)
(
5 Discharge temperature) – (8 Indoor
heat exchanger temperature)
(
8 Indoor heat exchanger temperature) –
(
7 Indoor intake air temperature)
Cool
Classification Item Result
Inspection
Temperature
difference
Heat
Inspection
Temperature
difference
Stable Unstable
˚F
˚F
Stable Unstable
˚F
˚F
* Fixed Hz operation may not be possible under the following tempera-
ture ranges.
A)In cool mode, outdoor intake air temperature is 104 ˚For higher or
indoor intake air temperature is 73 ˚F or lower.
B)In heat mode, outdoor intake air temperature is 68 ˚F or higher or
indoor intake air temperature is 77 ˚F 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.
˚F
81
72
63
54
45
36
27
18
9
0 18 36 54 72 90 108 126 144
Normal
Filter inspection
Inspection C
Inspection A
Inspection B
˚F
81
72
63
54
45
36
27
18
9
˚F˚F
Normal
Filter inspection
Inspection C
Inspection A
Inspection B
Cool mode Heat mode
(
7
Indoor intake air temperature)— (
8
Indoor
heat exchanger temperature)
(
8
Indoor heat exchanger temperature) —
(
7
Indoor intake air temperature)
[5 Discharge temperature] – [4 Outdoor
heat exchanger temperature)
[5 Discharge temperature] – [8 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
*
*1
18 36 54 72 90 108 126 144
The above judgement is just guide based on Japanese standard
conditions.
It may be changed depending on the indoor and outdoor temperature.
It may be judged as "filter inspection" due to the outdoor and indoor
temperature, even though it is not clogged.
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