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TROUBLESHOOTING
Retry
Alarm
Stop
YUTAKI S
Code
Code
61
-
(o)
70
P70
o
72
o
73
o
74
P74
o
76
-
o
77
-
o
78
o
79
-
o
80
-
o
81
-
o
83
-
o
84
-
o
85
-
o
100
-
o
155
PMML0575 rev.1 - 09/2021
YUTAKI S
Origin
COMBI
(o)
Communication
o
Indoor
o
Indoor
o
Indoor
o
Indoor
o
Indoor
o
Indoor-LCD
o
Indoor-LCD
o
Indoor -outdoor
Indoor
o
LCD
o
Indoor
o
Indoor
o
Indoor
o
Indoor
o
Indoor-LCD
Detail of Abnormality
Triggered in case no YCC messages
have been received for more than
180 seconds since last message was
received.
In case this alarm appears, software
stops Indoor and Outdoor operations
until communication is restored.
Hydraulic alarm flow & Water Pump
malfunction
Thermostat Heater Alarm
Mixing over-temperature limit
protection for Mixed circuit.
Unit over-temperature limit protection
Freeze Protection Stop by indoor
liquid temperature thermistor
Receiver Communication failure
RF Communication failure
Unit Capacity setting Error
LCD H-link RCS transmission error
(If no H-LINK RCS has no power)
"Momentary Power interruption" or
"Low voltage detected"
Low water pressure
High water pressure
Float Switch Alarm
Compressor protection
Main Factors
YCC stops sending messages to slave
unit since YCC has been powered
OFF or disconnected from the H-Link
Line or H-Link line has been damaged
Water flow is not detected in the
hydraulic cycle or Pump defective
High temperature is detected in
Electric Heater
Circuit 2 supply temperature > Target
temperature + offset
Two > Tmax +5K
No Opentherm/Hlink communication
for a continuous period of 10 minutes.
There is no communication for 1 hour
with on or two RF receives which are
bound to the RF-Bridge.
There is no concordance between
indoor outdoor unit capacity
No H-link communication for a
continuous period of 1 minute between
Indoor and LCD User control by
connection wiring (breaking, wiring
error, etc.)
Water pressure of the system is below
0.5 bar
Water pressure of the system has
increased above 3.7 bar
Float switch detects high level of water
at drain pane. Malfunction of the drain
pump.
It is required to configure "Float
switch" Accessory as input signal
"Compressor failure. This alarm code
appears when the following alarms 02,
07, 08, 45, 47 occur three times within
6 hours."
?
N O T E
This alarm is shown in the outdoor unit
with alarm code "EE".
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