Table of Contents
Advertisement
Diagnostic functional operation
Check
code
Operational cause
Regular communication error
between hydro unit and outdoor unit
E04
The serial signal cannot be received
from outdoor.
Duplicate address of Hydro unit, or
E08
Duplicate master Hydro unit during
Group control
Regular communication error
between hydro unit and 0-10 V-IF
E14
When there is no regular communication
from the 0-10 V interface for 3 min, or
when no 0-10 V interface is equipped.
Regular communication error
E18
between master Hydro unit and slave
Hydro unit during Group control
TC sensor error
F03
Open or short circuit in the heat
exchange temperature sensor.
TWI sensor error
F10
Open or short circuit in the water inlet
temperature sensor.
TWO sensor error
Open or short circuit in the water outlet
F11
temperature sensor.
TTW sensor error
Open or short circuit in the hot water
F14
cylinder sensor.
TFI sensor error
Open or short circuit in the floor
F17
temperature sensor.
(Only when zone 2 is used)
THO sensor error
Open or short circuit in the heater outlet
F18
temperature sensor.
Detection of THO disconnection error
When TWO – THO > 15K is detected
F19
and 30 sec elapsed.
TFI sensor error
When TWO – TFI > 50K is detected and
F20
TFI < TWI – 5K is detected 20 min.
Low pressure sensor error
Open circuit in the low pressure sensor.
F23
Determination and action
Backup
Automatic
operation
reset
1. Check the serial circuit.
• Miswiring of the crossover between
O
O
the water heat exchanger and the
outdoor unit
1. Set the address No. of DN_12 ~ 14
×
O
correctly for each Hydro unit.
1. Check the 0-10 V-IF connection.
×
×
2. Defect in the 0-10 V-IF.
1. Check the Hydro unit connection.
×
• Miswiring of the master and slave
O
Hydro unit.
1. Check the resistance value and
O
O
connection of the heat exchange
temperature sensor (TC).
1. Check the resistance value and
O
O
connection of the water inlet
temperature sensor (TWI).
Heating
1. Check the resistance value and
×
O
connection of the water outlet
Hot water
temperature sensor (TWO).
O
Heating
1. Check the resistance value and
O
O
connection of the hot water cylinder
Hot water
sensor (TTW).
×
Heating
1. Check the resistance value and
×
O
connection of the floor-inlet
Hot water
temperature sensor (TFI).
O
Heating
1. Check the resistance value and
×
O
connection of the heater outlet
Hot water
temperature sensor (THO).
O
Heating
1. Check for any disconnection of the
×
heater outlet temperature sensor
×
(THO).
Hot water
2. Defect of the flow sensor.
O
Heating
×
1. Check the connection of the floor-
×
inlet temperature sensor (TFI).
Hot water
O
1. Check the connection (body or
connection wiring) of the low
pressure sensor.
O
O
2. Check the refrigeration cycle (gas
leak)
100
Number of
abnormalities
Detailed
for
item
confirmation
1
117
1
—
1
—
1
—
1
117
1
119
1
119
1
120
1
120
1
120
1
121
1
122
1
123
Hide quick links:
Advertisement
Table of Contents
