Step Down / Safety Control → Standby (Forced Thermostat Off) → Stop Due To Malfunction; Stop Due To Malfunction - Panasonic Urban Multi MX1R Series Service Manual

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