Guide For Opration Condition; Cool Mode; Heat Mode - Mitsubishi Electric Mr.Slim PUHZ-ZRP35VKA Service Manual

<Guide for opration condition>
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.
Area Check item
Normal Normal operation state
Filter inspection Filter may be clogged. *1
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.
* The above judgement is just guide based on Japanese standard
conditions.
It may be changed depending on the indoor and outdoor
temperature.
*1
It may be judged as "Filter inspection" due to the outdoor and
indoor temperature, even though it is not clogged.
OCH527
Result
Good Retightened
Good Retightened
Good Retightened
M
V
Time
Times
A
HEAT
HEAT
COOL HEAT
COOL HEAT
Good Cleaning required
Good Cleaning required
None Present
COOL HEAT
COOL HEAT
HEAT
Time
Good Cleaning required
Good Cleaning required
Good Cleaning required
Good Cleaning required
None Present
Judgement
Cool Heat
Check Points
Enter the temperature differences between
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.
Classification
Inspection Is "D000" displayed stably on the remote
controller?
Temperature ( Discharge temperature) – (
difference heat exchanger temperature)
( Indoor intake air temperature) – (
Indoor heat exchanger temperature)
Inspection Is "D000" displayed stably on the remote
controller?
Temperature ( Discharge temperature) – (
difference heat exchanger temperature)
( Indoor heat exchanger temperature) –
( Indoor intake air temperature)
* Fixed Hz operation may not be possible under the following tempera-
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
* 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.

Cool mode

45
40
Inspection C
35
30
25
Filter inspection
20
Normal
15 Inspection B
10
Inspection A
5
0 10 20 30 40 50 60 70 80
[ Discharge temperature] – [
heat exchanger temperature)
120
, , and
Item Result
Stable Unstable
Outdoor
Stable Unstable
Indoor
or higher or
or lower.
or higher or
or lower.

Heat mode

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
Outdoor [ Discharge temperature] – [
heat exchanger temperature)
into
Indoor