ENGLISH
Alarm
Code
Retry
Stop
Code
YUTAKI
S/SC
YUTAKI
S80
YUTAKI
M
Origin
Detail of Abnormality
Main Factors
61
-
(o)
(o)
(o)
Indoor
No Cascade Messages.
Triggered in case unit is configured to
work against cascade control and:
- No messages have been received
for 180 seconds.
- No messages have been received
from beginning of operation.
In case this alarm appears, software
stops Indoor and Outdoor operations
until communication is restored.
Loose, disconnected, broken or
short-circuited connector
62
-
(o)
(o)
(o)
Indoor
Central mismatch.
Triggered in case YUTAKI CASCADE
CONTROLLER is configured and
they are received central messages
or central control is configured and
they are received messages form
YUTAKI CASCADE CONTROLLER.
In case this alarm appears, software
stops Indoor and Outdoor operations
until system is properly configured
Loose, disconnected, broken or
short-circuited connector
63
-
(o)
(o)
(o)
Communication
Transmission error between Central
and indoor communication
Indoor fuse meltdown, Indoor/central
connection wiring (breaking, wiring
error, etc.)
70
P70
o
o
o
Indoor
Hydraulic alarm flow & Water Pump
malfunction
Water flow is not detected in the
hydraulic cycle or Pump defective
83
P83
o
o
o
Indoor
Hydraulic alarm pressure
Water pressure is not detected in the
hydraulic cycle
72
o
-
-
Indoor
Thermostat Heater Alarm
High temperature is detected in
Electric Heater
73
o
o
o
Indoor
Mixing over-temperature limit
protection for Mixed circuit.
Circuit 2 supply temperature > Target
tempe offset
74
P74
o
o
o
Indoor
Unit over-temperature limit protection
Two > Tmax +5K
75
-
o
o
o
Indoor
Freeze Protection by Cold water inlet,
outlet temperature detection
76
-
o
o
o
Indoor
Freeze Protection Stop by indoor
liquid temperature thermistor
77
-
o
o
o
Indoor-LCD
Receiver Communication failure
No Opentherm/Hlink communication
for a continuous period of 10 minutes.
78
o
o
o
Indoor-LCD
RF Communication failure
There is no communication for 1 hour
with on or two RF receives which are
bound to the RF-Bridge.
79
-
o
o
o
Indoor -outdoor
Unit Capacity setting Error
There is no concordance between
indoor outdoor unit capacity
80
-
o
o
o
Indoor
LCD H-link RCS transmission error
No H-link communication for a
continuous period of 1 minute
between Indoor and LCD User
control by connection wiring
(breaking, wiring error, etc.)
LCD
(If no H-LINK RCS has no power)
81
o
o
o
Indoor
“Momentary Power interruption” or
“Low voltage detected”
TROUBLESHOOTING
PMML0575 rev.2 - 03/2022
315
