Mitsubishi Electric PUZ-HA30NHA5 Service Manual page 74

11-2. GUIDE FOR OPERATION CONDITION
Inspection item
Breaker
Terminal block Outdoor Unit
Indoor Unit
(Insulation resistance)
(Voltage)
1 Accumulated operating time
Com-
2 Number of ON/OFF times
pressor
3 Current
4 Refrigerant/heat exchanger temperature COOL
5 Refrigerant/discharge temperature COOL
6 Air/outside air temperature
(Air/discharge temperature)
Appearance
Heat exchanger
Sound/vibration
Air/intake air temperature
7
(Air/discharge temperature)
Refrigerant/heat exchanger temperature COOL
8
Filter operating time *
9
Decorative panel
Filter
Fan
Heat exchanger
Sound/vibration
* 1 The filter operating time is the time that has elapsed since the filter was reset.
Area Check item
Normal Normal operation state
Filter inspection Filter may be clogged.
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
* 2
temperature, even though it is not clogged.
OCH607
Result
Good Retightened
Good Retightened
Good Retightened
°F HEAT
°F HEAT
COOL °F HEAT
COOL °F HEAT
Good Cleaning required
Good Cleaning required
None Present
COOL °F HEAT
COOL °F HEAT
°F HEAT
1
Good Cleaning required
Good Cleaning required
Good Cleaning required
Good Cleaning required
None Present
Judgment
Cool Heat
* 2
Enter the temperature differences between
the graph given below.
Operation state is determined according to the plotted areas on
M"
the graph.
V
For data measurements, set the fan speed to "Hi" before activat-
Time
ing maintenance mode.
Times
A
Classification
°F
Inspection Is "000" displayed stably in Display
°F
on the remote controller?
°F
Temperature ( Discharge temperature) – (
5
°F
difference heat exchanger temperature)
( Indoor intake air temperature) – (
7
Indoor heat exchanger temperature)
Inspection
Is "000" displayed stably in Display
°F
on the remote controller?
°F
Temperature ( Discharge temperature) – (
5
°F
difference heat exchanger temperature)
Time
( Indoor heat exchanger temperature) –
8
( Indoor intake air temperature)
7
Notes:
1. 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.
2. 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.
3. In heat mode, the operation state may vary due to frost forming on the
outdoor heat exchanger.
Cool mode
°F
81
72
Inspection C
63
54
45
Filter inspection
36
Normal
27
18
Inspection A
9
0 18 36 54 72 90 108 126 144
[ 5 Discharge temperature] – [
heat exchanger temperature)
74
Check Points
, ,
5 4
Item
D
Outdoor
4
8
D
Indoor
8
Heat mode
°F ºF ºF
81 81 81
Inspection C
70 70 72
Filter inspection
63 63 63
54 54 54
45 45 45
Normal
36 36 36
Inspection B 27 27 27
18 18 18
Inspection A
9
9 9
°F
18 36 54 72 90 108 126 144
4 Outdoor [ 5 Discharge temperature] – [
heat exchanger temperature)
and into
7 8
Result
Stable Unstable
°F
°F
Stable Unstable
°F
°F
Inspection B
°F
8 Indoor