Panasonic U-4..6ML5XPQ, Service Manual

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Drawings & Flow Charts iii
Drawings & Flow Charts
A
abnormal discharge pipe temperature .................172
abnormal power supply voltage ...........................149
actuation of high pressure switch .........................164
actuation of low pressure sensor .........................166
address duplication of central
remote controller ...........................................201
address duplication, improper setting ..................211
C
centralized control group no. setting ....................100
CZ-02RT11P
type ..........................................100
CZ-01RW
type ...............................................101
CZ-02RW
type ...............................................101
group no. setting example .............................101
check for causes of drop in low pressure .............219
check for causes of rise in high pressure .............218
check for fan motor connector ..............................220
check operation ......................................................82
check operation not executed ..............................193
check work prior to turn power supply on ...............74
compressor motor lock .........................................168
contents of control modes ....................................102
how to select operation mode ........................103
cooling operation fan control ..................................52
D
display “under host computer integrate control” blinks
(repeats double blink) ...................................217
display “under host computer integrate control” blinks
(repeats single blink) .....................................214
display of sensor and address data .....................134
drain level above limit ...........................................152
drain pump control .................................................65
when the float switch is tripped and “AF” is
displayed on the remote controller ......66
when the float switch is tripped during heating
operation .............................................66
when the float switch is tripped while the cooling
thermostat is off ..................................65
when the float switch is tripped while the cooling
thermostat is on ..................................65
E
error of external protection device ........................142
excessive number of indoor units .........................200
F
failure of combination (between indoor unit pc board
and fan pc board) ..........................................158
failure of transmission (between indoor unit pc board
and fan pc board) ..........................................154
fan motor (M1F) lock, overload ............................146
f
reeze prevention ...................................................70
functional parts layout ............................................44
H
high pressure protection control ............................ 60
high voltage of capacitor in main inverter
circuit ............................................................ 188
I
improper combination of optional controllers for
centralized control ....................................... 209
inverter compressor abnormal ............................. 184
inverter current abnormal .................................... 185
inverter protection control ...................................... 63
inverter start up error ........................................... 186
L
louver control for preventing ceiling dirt ................. 67
low pressure drop due to refrigerant shortage or
electronic expansion valve failure ................ 189
low pressure protection control ............................. 61
M
malfunction of capacity determination device ...... 153
malfunction of discharge pipe thermistor
(R2T) ............................................................ 175
malfunction of drain level control system
(S1L) ............................................................ 144
malfunction of high pressure sensor ................... 180
malfunction of humidity sensor system ............... 161
malfunction of inverter radiating fin
temperature rise ........................................... 183
malfunction of low pressure sensor ..................... 181
malfunction of moving part of electronic expansion
valve (20E) ................................................... 150
malfunction of moving part of electronic expansion
valve (Y1E, Y3E) .......................................... 170
malfunction of outdoor unit fan motor .................. 169
malfunction of swing flap motor (MA) .................. 147
malfunction of system, refrigerant system address
undefined ..................................................... 205
malfunction of thermistor (R4T) ........................... 179
malfunction of thermistor (R6T)............................ 177
malfunction of thermistor (R1T) for outdoor air ... 174
malfunction of thermistor (R1T) for suction air .... 159
malfunction of thermistor (R2T)
for heat exchanger ....................................... 156
malfunction of thermistor (R3T) for gas pipes ..... 157
malfunction of thermistor (R3T, R5T) for
suction pipe 1, 2 ........................................... 176
malfunction of thermistor (R7T) for outdoor unit liquid
pipe .............................................................. 178
malfunction of thermistor for discharge air .......... 160
malfunction of thermostat sensor in
remote controller .......................................... 162
malfunction of transmission between central remote
controller and indoor unit .............................. 202
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