Table of Contents
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Diagnostic functional operation
Check
code
Operational cause
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 and
F19
30 sec elapsed.
TFI sensor error
When TWO–TFI>40K is detected and
F20
TFI<TWI–5K is detected 60 sec.
Low pressure sensor error
When PS<0.07 MPa is detected for 90
sec or more. (cooling, defrosting)
F23
When PS<0.07 MPa is detected for 10
min or more. (hot water supply, heating)
EEROM error
F29
Inconsistency is detected once without
verify ACK after writing to EEPROM.
Extended IC error
F30
When the extended IC is abnormal.
Combination error
L02
Model name of the outdoor unit is
different.
Communication error
L07
Individual hydro units have a group line.
Communication error
The capability code for the hydro unit
L09
has not been set.
Setting error
L16
When ZONE1 has not been set, while
ZONE2 has been set.
Slave Hydro unit error which occurs
when error occurs in master Hydro
unit
P31
Determination and action
Backup
Automatic
operation
reset
Heating
1. Check the resistance value and
×
O
connection of the hot water cylinder
Hot water
sensor (TTW).
O
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 switch.
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 resistance value of the
low pressure sensor.
3. Check the refrigeration cycle (gas
leak)
1. Replace the water heat exchange
×
×
control board.
1. Replace the water heat exchange
×
×
control board.
1. Check the model name of the
×
×
outdoor unit.
1. Replace the water heat exchange
×
×
control board.
1. Check the setting of the FC01
capability specifications.
×
×
HWS-P805xx-E = 0012
HWS-P1105xx-E = 0015
×
×
1. Check the body DP-SW12_2,3.
1. Check the remote controller
connection.
2. Defect in the remote controller.
×
O
3. Set the address No. of the Rotary
switch "SW01" correctly for each
Hydro unit.
88
Number of
abnormalities
Detailed
for
item
confirmation
1
107
1
107
1
107
1
108
1
109
1
110
1
110
1
110
1
110
1
110
1
111
1
111
1
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