78
12-2.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
:
HEAT
:
5
Refrigerant/discharge temperature
COOL
:
HEAT
:
6
Air/outside air temperature
COOL
:
HEAT
:
(Air/discharge temperature)
COOL
:
HEAT
:
Appearance
Good
Cleaning required
Heat exchanger
Good
Cleaning required
Sound/vibration
None
Present
Air/intake air temperature
COOL
:
HEAT
:
(Air/discharge temperature)
COOL
:
HEAT
:
8
7
9
Refrigerant/heat exchanger temperature COOL
:
HEAT
:
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 "D000" displayed stably on the remote
controller?
(
5
Discharge temperature) – (
4
Outdoor
heat exchanger temperature)
(
7
Indoor intake air temperature) – (
8
Indoor heat exchanger temperature)
Is "D000" displayed stably on the remote
controller?
(
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
:
:
Stable Unstable
:
:
* Fixed Hz operation may not be possible under the following tempera-
ture ranges.
A)In cool mode, outdoor intake air temperature is 40
:
or higher or
indoor intake air temperature is 23
:
or lower
B)In heat mode, outdoor intake air temperature is 20
:
or higher or
indoor intake air temperature is 25
:
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.
:
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
:
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
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
*
The above judgement is just guide based on Japanese standard
conditions.
It may be changed depending on the indoor and outdoor temperature.
OC359A-3.qxp 06.7.12 3:08 PM Page 78