Mitsubishi Electric Mr. Slim PUZ-M200YKA2.UK Service Manual page 84

<Guide for operation condition>
Enter the temperature differences between
Operation state is determined according to the plotted areas on the graph.
For data measurements, set the fan speed to "Hi" before activating maintenance mode.
Inspection item
Breaker
Terminal block Outdoor Unit
Indoor Unit
(Insulation resistance)
(Voltage)
Accumulated operating time
Com-
Number of ON/OFF times
pressor
Current
Refrigerant/heat exchanger temperature COOL
Refrigerant/discharge temperature COOL
Air/outside air temperature
(Air/discharge temperature)
Appearance
Heat exchanger
Sound/vibration
Air/intake air temperature
(Air/discharge temperature)
Refrigerant/heat exchanger temperature COOL
Filter operating time*
Decorative panel
Filter
Fan
Heat exchanger
Sound/vibration
* The filter operating time is the time that has elapsed since the filter was reset.
Cool mode
45
40
35
30
25
20
15
10
[
heat exchanger temperature)
OCH775B
Checkpoints
, , and
Result
Good Retightened
Good Retightened
Good Retightened
HEAT
HEAT
COOL HEAT
COOL HEAT
Good Cleaning required
Good Cleaning required
None Present
COOL HEAT
COOL HEAT
HEAT
Good Cleaning required
Good Cleaning required
Good Cleaning required
Good Cleaning required
None Present
Inspection C
Filter inspection
Normal
Inspection B
Inspection A
5
0 10 20 30 40 50 60 70 80
Discharge temperature] – [ Outdoor
Area
Normal Normal operation state
Filter may be clogged.*
Filter inspection
Inspection A Performance has dropped. Detailed in-
spection is necessary.
Inspection B Refrigerant amount is dropping.
Inspection C Filter or indoor heat exchanger may be
clogged.
Note: The above judgment 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.
into the graph given below.
Classification
Inspection Is "D000" displayed stably on the remote
controller?
Temperature ( Discharge temperature) – (
difference heat exchanger temperature)
M
( Indoor intake air temperature) – (
V
Indoor heat exchanger temperature)
Time
Inspection Is "D000" displayed stably on the remote
Times
controller?
A
Temperature ( Discharge temperature) – (
difference heat exchanger temperature)
( Indoor heat exchanger temperature) –
( Indoor intake air temperature)
Notes:
Fixed Hz operation may not be possible under the following tempera-
1.
ture ranges.
A)In cool mode, outdoor intake air temperature is 40
indoor intake air temperature is 23
B)In heat mode, outdoor intake air temperature is 20
indoor intake air temperature is 25
2. If the air conditioner is operated at a temperature range other than the
Time
ones above but operation is not stabilized after 30 minutes or more have
elapsed, carry out inspection.
3. In heat mode, the operation state may vary due to frost forming on the
outdoor heat exchanger.
Heat mode
Result
Judgment
Check item
Cool
84
Item
Outdoor
Indoor
or lower.
or lower.
45
Inspection C
40
Filter inspection
35
30
25
Normal
20
15
Inspection B
10
Inspection A
5
0 10 20 30 40 50 60 70 80
[ Discharge temperature] – [ Indoor
heat exchanger temperature)
Heat
Result
Stable Unstable
Stable Unstable
or higher or
or higher or