PACD011001C2 Function
Function Urban Multi “MX1R, ME1R Series” Using R-407C 255
1.13 Step Down / Safety Control
→
Standby (Forced Thermostat OFF)
→
Stop Due
to Malfunction
1.13.1 MX1R Series
High Pressure (Hp) Control
Low Pressure (Lp) Control
Discharge Pipe Temperature (Td) Control
Inverter Current Control
Discharge Super
Heating (DSH)
Control
(DSH = Td - high pressure condensation saturation temperature)
During both the inverter and standard compressors are running, when the injection valve for either one
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.
Hp≥26.0kg/cm²
(2.54MPa)
Hp≥21.0kg/cm²
(2.058MPa)
Hp≥26.3kg/cm²
(2.577MPa)
Hp>28.7kg/cm²
(2.812MPa)
Hp>31.5kg/cm²
(3.087MPa)
(Cooling)
Frequency
1 STEP DOWN
(Heating)
30Hz+OFF(30Hz)
8, 10HP(5HP)
76Hz+OFF(48Hz)
Forced OFF
by thermostat
E3 stop due
to malfunction
(M013)
Lp>2.0kg/cm²
(0.196MPa)
Lp<1.7kg/cm²
(0.167MPa)
DSH>30˚C
&
Lp<1.2kg/cm²
(0.118MPa)
Lp<0.3kg/cm²
(0.029MPa)
Lp<0kg/cm²
(0MPa)
(Cooling)
30Hz+OFF (30Hz)
(Heating)
Lp<0.8kg/cm²
(0.078MPa)
Lp≥0.5kg/cm²
(0.049MPa)
Hot gas bypass
valve ON
116Hz+OFF(76Hz)
or
60Hz+ON(76Hz)
Injection valve ON
Lp<0.8kg/cm²
(0.078MPa)
54 Hz + OFF (54Hz)
as lower limit
Forced OFF
by thermostat
Up to 2 times
in 30 minutes
E4 stop due
to malfunction
Hot gas bypass
valve ON
(M014)
Td≥130˚C
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<2kg/cm²
or (0.196MPa)
Td>90˚C&During high pressure control&Lp<3.5kg/cm²
(0.343MPa)
u38Hz+OFF(38Hz): Both high
u106Hz+OFF(-): STD only high
u38Hz+ON(-): INV only high
Td>135˚C
Forced thermostat OFF
Up to 2 times
in 100 minutes
Td≥135˚C
F3 stop due
to malfunction
(M015)
Control
during
heating
( )
INV≥30.0A
FREQUENCY
1 STEP DOWN
L8 stop due
to malfunction
INV≥30.0A
Forced OFF by thermostat
UP to 4 times in 60 minutes
(M016)
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