Panasonic CU-8ME1XPK - Page 176

PACD011001C2 Troubleshooting by Remote Controller
Troubleshooting Urban Multi “MX1, ME1 Series” Using R-22 155
Outdoor
Unit
J6
999
Malfunction of thermistor (R2T) for heat exchanger
(loose connection, disconnection, short circuit, failure)
177
J6
879
Malfunction of thermistor (R2T) for heat exchanger
(loose connection, disconnection, short circuit, failure)
177
JA
999
Malfunction of discharge pipe pressure sensor 178
JC
999
Malfunction of suction pipe pressure sensor 179
JH
879
Malfunction of oil temperature thermistor (R5T) 180
L0
999
Failure of inverter system —
L4
999
Malfunction of inverter radiating fin temperature rise 194
L5
999
Inverter instantaneous over-current 195
L6
999
Compressor motor insulation defect, short circuit —
L8
999
Inverter thermostat sensor, Compressor overload 196
L9
999
Inverter stall prevention, Compressor lock 197
LA
999
Malfunction of power unit —
LC
999
Malfunction of transmission between inverter and
control PC board
198
System
P0
979
Gas depletion (heat build up) —
P1
999
Inverter over-ripple protection 200
P4
999
Malfunction of inverter radiating fin temperature rise
sensor
201
U0
879
Low pressure drop due to refrigerant shortage or
electronic expansion valve failure
181
U1
999
Negative phase / open phase 182
U2
999
Power supply insufficient or instantaneous failure 199
U4
999
Malfunction of transmission between indoor units 183
U5
999
Malfunction of transmission between remote controller
and indoor unit
184
U5
787
Failure of remote controller PC board or setting during
control by remote controller
—
U7
999
Malfunction of transmission between indoor units
Malfunction of transmission between outdoor units,
malfunction of transmission between outdoor unit and ice
build-up heat unit
—
U7
879
Malfunction of transmission between outdoor units (cool/
heat unified, low noise)
185
U8
997
Malfunction of transmission between master and slave
remote controllers (malfunction of slave remote
controller)
186
U9
999
Malfunction of transmission between indoor and outdoor
units in the same system
187
UA
999
Excessive number of indoor units 188
UC
888
Address duplication of central remote controller 189
UE
999
Malfunction of transmission between central remote
controller and indoor unit
202
UF
999
Refrigerant system not set, incompatible wiring / piping 190
UH
999
Malfunction of system, refrigerant system address
undefined
191
Centralized
Control and
Schedule
Timer
UE
999
Malfunction of transmission between central remote
controller and indoor unit
202
207
M1
8
or
99 9
PC board defect 203
208
M8
8
or
99 9
Malfunction of transmission between optional controllers
for centralised control
204
209
MA
8
or
99 9
Improper combination of optional controllers for
centralised control
205
210
MC
8
or
99 9
Address duplication, improper setting 206
211
In case of the malfunction with the shaded error code, the unit still operates. However, be sure to have it inspected and
repaired and as soon as possible.
Malfunction
code
Operation
lamp
Inspection
display
Unit No. Malfunction contents Page
Refered