Troubleshooting
LFIS-B-1211
108
Electrical Control System
2.4.4.12. P2 malfunction
(Only for 30K~60K)
P2 display
Low pressure protection
Judge 1: Whether the
wiring between the low
pressure protector and main
control board is connected
well or correctly
Method: Short connect the
low pressure protector
socket, check whether the
system can run normally
Yes
No
Connect it well
Replace outdoor main board
No
Replace low pressure protector
Yes
Judge 2: Whether
the low pressure
protector is broken
Check whether
the refrigerant
system is ok
Judge 3: Check whether the
outdoor ambient
temperature is too low
No
Stop the unit
Yes
Method: Connect the pressure
gauge to the gauge joint of the
system, check whether the
pressure is lower than
0.14MPa
No
Leak hunting: Charge nitrogen or refrigerant
to the system, if the leakage is serious, there
will be distinct gas leakage “cici” sound; if the
leakage is slight, use the suds (mixture of
water and abluent is also ok if it can make
bubble) or electronic leak detector.
Yes
Judge 5: The refrigerant
pipe is blocked
No
Let the refrigerant out, then use the high
pressure nitrogen or refrigerant to blow pipe,
vacuumize and charge the refrigerant again
Yes
Judge 4: The
refrigerant of the
system is leakage
Summary of Contents for SUPER DC INVERTER SERIES
Page 1: ...Contents i New Energy Requirement SUPER DC INVERTER SERIES Service Manual 2012 LFIS B 1211 ...
Page 2: ...ii General Information ...
Page 4: ......
Page 17: ...LFIS B 1211 Service Space Indoor Units 13 3 Service Space 1000mm 1000mm 1000mm 1000m m ...
Page 23: ...LFIS B 1211 Field Wiring Indoor Units 19 9 Field Wiring ...
Page 36: ...Duct Type LFIS B 1211 32 Indoor Units 10 Field Wiring ...
Page 40: ...Duct Type LFIS B 1211 36 Indoor Units 3 Service Space ...
Page 44: ...Field Wiring LFIS B 1211 40 Part 3 9 Field Wiring ...
Page 50: ...Wiring Diagrams LFIS B 1211 46 Part 3 KOU 36HFN1 RRC4 ...
Page 100: ...Troubleshooting LFIS B 1211 96 Electrical Control System 2 4 2 3 Up down panel is not closed ...
