Test Run; Typical Unit Operation; Outdoor Unit Function Setting - Mitsubishi Electric City Multi PURY-HP-TKMU-A-H Manuel D'installation

12. Test run

12.1. Typical unit operation

Items to be checked before a test run
-
Warning:
source cable from the terminal block to measure the insulation resistance.
Turn on the power at least 12 hours before performing a test run.
- Doing so will energize the compressor and evaporate the refrigerant in the compressor.
Caution:
The events listed in the table below are normal occurrences and do not represent operation problems.
Events
cooling or heating operation.
direction.
Fan speed automatically changes during
heating operation.
Fan stops during heating operation.
Fan does not stop even if unit is not
operating.
At initial stat in heating operation, fan
cannot be manually set.
Indoor unit remote controller displays "H0"
or "PLEASE WAIT" for about 5 minutes
after turning on the universal power supply.
Drain pump continues to operate even
after the unit has been turned off.
Indoor unit and outdoor unit emit noise
when switching from heating to cooling
and vice versa.
Immediately after start-up, the indoor unit
Warm air is omitted from an indoor unit that
is not performing the heating operation.

12.2. Outdoor unit function setting

Function settings can be made by setting SW4, SW6, and SWP01 on the outdoor unit control board.
To make function settings, set the 10th bit of SW6 to ON, and then set SW4. To change the setting, press SWP01 for two seconds or longer. The switch settings can
be checked on LED3. (The item No. will be displayed on LED1.)
Write down the switch settings on the electrical wiring diagram label on the control box panel for future reference when the control board needs to be replaced.
<SW4 setting item list>
Setting item No.
Item
(*2)
848
921
Setting
929
Heating Capacity
(*1)
935
974 Base heater (*6)
*1 Check on LED3 that the switches are set correctly.
*2 Change the setting item No. when the 10th bit of SW6 is set to ON.
*3 This will blink while the system is starting up.
*4 After setting the setting item No., press SWP01 for two seconds or longer.
*5 The table below shows the combinations of the settings for items No.929 and No.935 and the Heating Capacity mode setting that corresponds to each
combination.
Switch
OFF
OFF Intelligent Heat
No.935
ON HighHeat
*6 The default setting for the setting item No.974 on the PURY-HP-T/YKMU-H series units is "ON."
Set this switch to "OFF" to output error signals. When this switch is set to "OFF," base heaters cannot be used.
28
Display on remote controller
"Cooling" or "heating"
Normal display
Normal display
Defrost display
No display
Heat ready
"H0" or "PLEASE WAIT"
No display
Normal display
Normal display
Normal display
Setting (LED3 display (*3))
Setting content
OFF (unlit)
Ondefrost Ineffective
LED1 display Celsius
Depends on the setting combination (*5)
mode
Ineffective
No.929
ON
Standard
–
Because another indoor unit is performing the heating or cooling operation, the
cooling or heating operation for the indoor unit in question is not operating.
hour. At defrost in heating mode or immediately after heating start-up/shutdown, the
Unit fan operates in ultra-low speed when thermostat is turned off; automatically changes
over to set value via timer or refrigerant temperature when thermostat is turned off.
Fan does not operate when unit is in defrost mode.
When in heating mode, fan still runs for 1 minute after unit stops to exhaust any
residual heat.
Fan automatically runs in ultra-low speed for 5 minutes after system is turned on, or
for 2 minutes thereafter until set temperature is reached.
System is performing the initial operating sequence. Remote controller will be
After turning off the cooling operation, unit continues to operate the drain pump for 3
minutes, then shuts it off.
Unit also continues to operate drain pump if condensate has been generated.
This is a normal sound of the refrigerant circuit operating properly.
a problem.
The LEV is slightly open for preventing any refrigerant, inside of the indoor unit that is not
ON (lit) 1 2
Effective 0 0
Fahrenheit 1 0
1 0
1 1
Effective 0 1
Cause
SW4 0: OFF, 1: ON
SWP01
3 4 5 6 7 8 9 10
0 0 1 0 1 0 1 1
0 1 1 0 0 1 1 1
0 0 0 1 0 1 1 1 (*4)
1 0 0 1 0 1 1 1
1 1 0 0 1 1 1 1