Panasonic PRO-HT Tank Series Technical Manual page 92

Error Codes PACi & ECOi
10
90
Alarm codes for indoor/outdoor units ECOi MF3 (continued)
Error group Symptoms
Thermistor fault Outdoor thermistor is either open or
damaged
Outdoor thermistor is either open or
damaged.
Activation of protec- Protective device in indoor unit is activated.
tive device
Protective device in outdoor unit is activated.
Indoor unit communication error of group
control wiring.
EEPROM on indoor unit PCB failure.
EEPROM on outdoor unit PCB has failure.
Protective device Protective device for compressor No. 1 is
for compressor is activated.
activated
Protective device for compressor No. 2 is
activated.
Oil sensor fault.
(Disconnection, etc.)
Abnormal device function
<< >> Alarm indication: Does not affect the operation of other indoor units.
< > Alarm indication: In some cases may affect the operation of other indoor units.
Possible causes / Remedy
Compressor 1 discharge temperature sensor has failure. (DISCH1)
Compressor 2 discharge temperature sensor has failure. (DISCH2)
Outdoor unit heat exchanger 1 gas temperature sensor has failure.
(EXG1)
Outdoor unit heat exchanger 1 liquid temperature sensor has failure.
(EXL1)
Outdoor temperature sensor has failure. (TO)
Compressor inlet temperature sensor has failure. (SCT)
Subcooling heat exchanger temperature sensor has failure. (SCG)
High pressure sensor has failure. (HPS)
Low pressure sensor has failure. (LPS)
Outdoor unit heat exchanger 2 gas temperature sensor has failure.
(EXG2)
Outdoor unit heat exchanger 2 liquid temperature sensor has failure.
(EXL2)
Thermal protector for Indoor unit fan motor is activated.
Connection to the panel of indoor unit is not good.
Float switch of drain pan safety is activated.
Cooling water freeze (Air-to-Water)
Indoor unit fan inverter protection control is activated.
O sensor has activated.
2
Compressor 1 discharge temperature is too high.
High pressure switch is activated.
Compressor 1 AC power supply has abnormal.
Compressor 2 AC power supply has abnormal.
Compressor 1 secondary current is overcurrent.
Compressor 2 discharge temperature is too high.
Compressor 2 start failure. Compressor 2 is missing phase.
Outdoor unit fan motor has failure.
WHE water pump interlock OFF alarm
WHE pump interlock error (EXCT error)
Compressor 2 secondary current is overcurrent.
Compressor 1 start failure. Compressor 1 is missing phase.
Other indoor unit in group control has an alarm.
Compressor 1 primary current is overcurrent.
Compressor 1 current sensor is disconnected or shorted.
Compressor 1 discharge temperature sensor is disconnected,
shorted or misplaced. (DISCH1)
Compressor 2 primary current is overcurrent.
Compressor 2 current sensor is disconnected or shorted.
Compressor 2 discharge temperature sensor is disconnected,
shorted or misplaced. (DISCH2)
Low pressure sensor value is too low.
Compressor 1 oil temperature sensor has failure. (OIL1)
Compressor 2 oil temperature sensor has failure. (OIL2)
Compressor 2 HIC has failure. HIC is overcurrent or overheat.
VDC is undervoltage or overvoltage.
Compressor 1 HIC has failure. HIC is overcurrent or overheat.
VDC is undervoltage or overvoltage.
PAW-VP•LDHW - Technical Manual – 2020-07
Wired remote
controller display
F04
F05
F06
F07
F08
F12
F14
F16
F17
F23
F24
<<P01>>
<<P09>>
<<P10>>
<<P11>>
<<P12>>
P14
P03
P04
P05
P15
P16
P17
P19
P22
P23
P26
P29
<P31>
F29
F31
H01
H03
H05
H11
H13
H15
H06
H08
H27
H21
H31