Daikin REYQ72, Serveice Manual

Page: 123 / 273

SiUS39-602
112 Troubleshooting
2.27 “
J5
” Outdoor Unit: Malfunction of Thermistor (R2T) for
Suction Pipe ......................................................................................... 158
2.28 “
J6
” Outdoor Unit: Malfunction of Thermistor (R4T) for
Outdoor Unit Heat Exchanger .............................................................. 159
2.29 “
J7
” Malfunction of Receiver Outlet Liquid Pipe Thermistor (R6T) ....... 160
2.30 “ J8 ” Malfunction of Oil Equalizing Pipe Thermistor (R7T) .................... 161
2.31 “
J9
” Malfunction of Sub-cooling Heat Exchanger Gas Pipe Thermistor
(R5T) .................................................................................................... 162
2.32 “
JA
” Outdoor Unit: Malfunction of Discharge Pipe Pressure Sensor .... 163
2.33 “ JC ” Outdoor Unit: Malfunction of Suction Pipe Pressure Sensor......... 164
2.34 “ L4 ” Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise ................................................................................ 165
2.35 “
L5
” Outdoor Unit: Inverter Compressor Abnormal ............................... 166
2.36 “
L8
” Outdoor Unit: Inverter Current Abnormal....................................... 167
2.37 “ L9 ” Outdoor Unit: Inverter Start up Error ............................................. 168
2.38 “
LC
” Outdoor Unit: Malfunction of Transmission between Inverter
and Control PC Board .......................................................................... 169
2.39 “
P1
” Outdoor Unit: Inverter Over-Ripple Protection ............................... 171
2.40 “
P4
” Outdoor Unit: Malfunction of Inverter Radiating Fin
Temperature Rise Sensor .................................................................... 172
2.41 “
PJ
” Outdoor Unit: Faulty Field Setting after Replacing Main PC Board
or Faulty Combination of PC Board ..................................................... 173
2.42 “
UO
” Outdoor Unit: Low Pressure Drop due to Refrigerant Shortage or
Electronic Expansion Valve Failure ..................................................... 174
2.43 “
U1
” Outdoor Unit: Reverse Phase, Open Phase .................................. 175
2.44 “
U2
” Outdoor Unit: Power Supply Insufficient or
Instantaneous Failure .......................................................................... 176
2.45 “ U3 ” Outdoor Unit: Check Operation not Executed ............................... 178
2.46 “ U4 ” Malfunction of Transmission between Indoor Units ...................... 179
2.47 “
U5
” Indoor Unit: Malfunction of Transmission between
Remote Controller and Indoor Unit ...................................................... 181
2.48 “
U7
” Indoor Unit: Malfunction of Transmission between
Outdoor Units ....................................................................................... 182
2.49 “
U8
” Indoor Unit: Malfunction of Transmission between
MAIN and SUB Remote Controllers..................................................... 184
2.50 “
U9
” Indoor Units: Malfunction of Transmission between
Indoor Units and Outdoor Units in the Same System .......................... 185
2.51 “
UA
” Improper Combination of Indoor Units and
Outdoor Units/Indoor Units and Remote Controller ............................. 187
2.52 “
UC
” Address Duplication of Centralized Remote Controller ................. 188
2.53 “
UE
” Malfunction of Transmission between Centralized Controller and
Indoor Unit ........................................................................................... 189
2.54 “
UF
” System is not Set yet..................................................................... 191
2.55 “
UH
” Malfunction of System,
Refrigerant System Address Undefined............................................... 192
3. Troubleshooting (OP: Central Remote Controller) ..............................194
3.1 “
M1
” PC Board Defect ............................................................................ 194
3.2 “
M8
” Malfunction of Transmission Between Optional Controllers for
Centralized Control .............................................................................. 195
3.3 “
MA
” Improper Combination of Optional Controllers for
Centralized Control .............................................................................. 196