Panasonic Urban Multi MX1R Series Service Manual page 277

Function
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 ME1R Series
High Pressure (Hp) Control
Hp≥23.8kg/cm²
(2.332MPa)
Heat exchanger
capacity control
Low Pressure (Lp) Control
(Cooling)
Lp>2.0kg/cm²
(0.196MPa)
32Hz+OFF
(Heating, simultaneous cool / heat operation)
Lp<1.7kg/cm²
(0.167MPa)
106Hz+OFF
or
62Hz+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≥16.5A
FREQUENCY
1 STEP DOWN
256
Hp≥25.5kg/cm²
(2.499MPa)
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>28.7kg/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
u38Hz+OFF: Both high
u106Hz+OFF(-): STD only high
u38Hz+ON(-): INV only high
Forced thermostat OFF
UP to 4 times in 60 minutes
Function Urban Multi "MX1R, ME1R Series" Using R-407C
PACD011001C2
Hp>31.5kg/cm²
(2.812MPa) (3.087MPa)
E3 stop due
to malfunction
Lp<0kg/cm²
(0.029MPa)
E4 stop due
to malfunction
Td>135˚C Td≥135˚C
Forced thermostat OFF F3 stop due
Up to 2 times to malfunction
in 100 minutes
L8 stop due
INV≥16.5A
to malfunction
(VF001)
(0MPa)
(VF002)
(VF005)
(VF004)