28
GB
12. Test run
12.1. Typical unit operation
Items to be checked before a test run
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-
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Warning:
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source cable from the terminal block to measure the insulation resistance.
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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:
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The events listed in the table below are normal occurrences and do not represent operation problems.
Events
Display on remote controller
Cause
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cooling or heating operation.
“Cooling” or “heating”
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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.
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direction.
Normal display
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hour. At defrost in heating mode or immediately after heating start-up/shutdown, the
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Fan speed automatically changes during
heating operation.
Normal display
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 stops during heating operation.
Defrost display
Fan does not operate when unit is in defrost mode.
Fan does not stop even if unit is not
operating.
No display
When in heating mode, fan still runs for 1 minute after unit stops to exhaust any
residual heat.
At initial stat in heating operation, fan
cannot be manually set.
Heat ready
Fan automatically runs in ultra-low speed for 5 minutes after system is turned on, or
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for 2 minutes thereafter until set temperature is reached.
Indoor unit remote controller displays “H0”
or “PLEASE WAIT” for about 5 minutes
after turning on the universal power supply.
“H0” or “PLEASE WAIT”
ÀDVKHV
System is performing the initial operating sequence. Remote controller will be
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Drain pump continues to operate even
after the unit has been turned off.
No display
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.
Indoor unit and outdoor unit emit noise
when switching from heating to cooling
and vice versa.
Normal display
This is a normal sound of the refrigerant circuit operating properly.
Immediately after start-up, the indoor unit
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Normal display
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a problem.
Warm air is omitted from an indoor unit that
is not performing the heating operation.
Normal display
The LEV is slightly open for preventing any refrigerant, inside of the indoor unit that is not
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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>
Item
Setting item No.
(*2)
Setting content
Setting (LED3 display (*3))
SW4 0: OFF, 1: ON
SWP01
OFF (unlit)
ON (lit)
1
2
3
4
5
6
7
8
9 10
Setting
(*1)
848
Ondefrost
Ineffective
Effective
0
0
0
0
1
0
1
0
1
1
(*4)
921
LED1 display
Celsius
Fahrenheit
1
0
0
1
1
0
0
1
1
1
929
Heating Capacity
mode
Depends on the setting combination (*5)
1
0
0
0
0
1
0
1
1
1
935
1
1
1
0
0
1
0
1
1
1
974
Base heater (*6)
Ineffective
Effective
0
1
1
1
0
0
1
1
1
1
*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
No.929
OFF
ON
No.935
OFF
Intelligent Heat
Standard
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.
