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9.
ALARM CODES
If error or alarm conditions arise during normal operation of the unit, faults will be indicated on the dis-
play by icons (
); it will also be possible to obtain more information about active errors by checking the
specific page in the "View" "Error" page menu (as specified in paragraph 6.3).
Possible errors (with relative codes) are as follows:
Label Error
Ambient sensor
Defrost sensor
Discharge sensor
Suction sensor
Econ. in sens.
Econ. out sens.
Error fan
High pressure
Low pressure
Hi-discharge
Capacity DIP
ODU-IDU Com.
Drive main com
IDU Com.
HI-pre. sens.
Temp HELW
Temp AHLW
Temp HEEW
HI-pre. sens.
T-remote room
HP-Water Switch
Auxi. heater 1
Auxi. heater 2
Auxi. -WTH
DC under vol.
DC over vol.
AC curr. pro.
IPM defective
PFC defective
Start failure
Phase loss
Driver Com.
Driver reset
Com. over-cur.
Overspeed
Current sen.
Desynchronize
Description
indicates a malfunction of the external air sensor
Indicates a malfunction of defrosting temperature sensor on the outdoor
unit
Indicates a malfunction of the temperature sensor on compressor delivery
Indicates a malfunction of the temperature sensor on compressor intake
Indicates a malfunction of the temperature sensor at the economizer input
Indicates a malfunction of the temperature sensor at the economizer output
Indicates a malfunction affecting the fan on the outdoor unit
Indicates abnormal pressure on the high pressure side of the cooling circuit
Indicates abnormal pressure on the low pressure side of the cooling circuit
Indicates an abnormal temperature on the compressor discharge
Indicates a DIP SWITCH positioning error on the outdoor unit board
Indicates a serial communication error between the AP1 and AP2 cards on
the outdoor unit
Indicates a serial communication error between the AP2 and AP4 cards on
the outdoor unit
Indicates a serial communication error between the AP1 cards and flush
panel (display)
Indicates a fault on the high pressure transducer
Indicates a fault on the temperature sensor at heat exchanger plate outlet
(water side)
Indicates a fault on the temperature sensor located downstream of the
3-way valve if the installation includes an auxiliary electrical resistance or a
supplementary heat source
Indicates a fault on the temperature sensor at heat exchanger plate inlet
(water side)
Indicates a fault on the temperature sensor located on the accessory DHW
storage tank
indicates a malfunction of the ambient air sensor supplied with the unit
Indicates an alarm generated by the flow switch at the input to the outdoor
unit (water side)
Indicates a malfunction affecting the auxiliary resistance 1 (KM1)
Indicates a malfunction affecting the auxiliary resistance 2 (KM2)
Indicates a malfunction affecting the resistance placed in the accessory
DHW storage tank (KM3)
Indicates an error caused by low voltage on the DC bus or an error caused
by a voltage drop
Indicates an error caused by high voltage on the DC bus
Indicates an abnormal value for AC current (AC protection)
Indicates an operating fault on the IPM module (inverter power module)
Indicates an operating fault on the PFC module (power correction module)
Indicates a fault in the unit's start-up phase
Indicates a problem associated with the loss or unbalance of voltage phases
Indicates a communication error with the unit's drivers
Indicates a reset made on the unit's drivers
Indicates that an overcurrent on the compressor has been detected
Indicates that an incorrect compressor speed has been detected
Indicates an abnormal value for the current sensor
Indicates that the compressor is out of sync
Code
F4
d6
F7
F5
F2
F6
EF
E1
E3
E4
c5
e6
P6
E6
Fc
F9
dH
——
FE
F3
Ec
EH
EH
eh
PL
PH
PA
H5
Hc
Lc
Ld
P6
P0
P5
LF
Pc
H7
37
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