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 congured 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 congured and
they are received central messages
or central control is congured and
they are received messages form
YUTAKI CASCADE CONTROLLER.
In case this alarm appears, software
stops Indoor and Outdoor operations
until system is properly congured
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 ow & Water Pump
malfunction
Water ow 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
temperature + 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