Panasonic Urban Multi MX1R Series Service Manual page 64

PACD011001C2
Discharge Super
(DSH = Td - high pressure condensation saturation temperature)
Heating (DSH) During both the inverter and standard compressors are running, when the injection valve for either one
Control
goes OFF and discharge super heating (DSH) continues for 10 minutes at temperature difference of less
than 10°C, the inverter+standard compressor are controlled at 76 Hz or less+OFF for 3 minutes.
Control According
If the outdoor temperature exceeds 27°C when heating, forced thermostat OFF is carried out in order to
to Outdoor
prevent a safety device from being tripped or a sensor malfunction.
Temperature
1.13.2 ME1 Series
High Pressure (Hp) Control
Hp≥21.3kg/cm²
(2.087MPa)
Heat exchanger
capacity control
Low Pressure (Lp) Control
(Cooling)
Lp>2.0kg/cm²
(0.196MPa)
30Hz+OFF
(Heating, simultaneous cool / heat operation)
Lp<1.7kg/cm²
(0.167MPa)
106Hz+OFF
or
60Hz+ON
Discharge Pipe Temperature (Td) Control
Td>105˚C
or
DSH>55˚C (DSH = Discharge Super Heating)
or
Td>90˚C&Lp<3kg/cm² (Control during cooling)
or (0.294MPa)
Td>90˚C&Lp<1.0kg/cm²
or (0.098MPa)
(Injection solenoid valve ON)
Inverter Current Control
INV≥15.0A(Y1)
FREQUENCY
1 STEP DOWN
Function Urban Multi "MX1, ME1 Series" Using R-22
Hp≥23.0kg/cm²
(2.254MPa)
76Hz+OFF
DSH>15˚C
&
or
Lp<1.2kg/cm²
(0.118MPa)
Injection valve ON Hot gas bypass
valve ON
LP<0.8
&
R5T<Te + 10ºC
or
LP<0.5
&
R5T≥Te + 10ºC
Hot gas bypass
valve ON
( Control during heating )
&
Simultaneous
cool / heat operation
Hp>25.0kg/cm²
Forced thermostat OFF
Up to 2 times
in 30 minutes
LP<0.8
&
R1T>5ºC
LP<0.5
&
R1T≤5ºC
Lp<0.3kg/cm²
Forced thermostat
OFF
Up to 2 times
in 30 minutes
Td≥130˚C
K
K
38Hz+OFF : Both high
K
106Hz+OFF(-): STD only high
38Hz+ON(-): INV only high
Forced thermostat OFF
UP to 4 times in 60 minutes
Hp>27.5kg/cm²
(2.450MPa)
E3 stop due
to malfunction
Lp<0kg/cm²
(0.029MPa)
E4 stop due
to malfunction
Td>135˚C
Forced thermostat OFF F3 stop due
Up to 2 times to malfunction
in 100 minutes
L8 stop due
INV≥15.0A(Y1)
to malfunction
Function
(2.695MPa)
(VF001)
(0MPa)
(VF002)
Td≥135˚C
(VF005)
(VF004)
43