Alarm
Code
Retry
Stop
Code
Yutaki
S/SC
Yutaki
S80
Yutaki
M
Origin Detail of Abnormality Main Factors
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”
101 - o - Indoor Activation of high pressure switch
102 P12 - o - Indoor
Activation of protection control for
excessively high pressure
Stop after P12 retry due to
discharge pressure Pd ≥ 2.78 MPa
continued for 10 seconds.
104 P06 - o - Indoor Activation of low control
Stop after P06 retry due to Ps ≤
0.15 MPa continued for 90 seconds
104 P06 - o - Indoor Activation of low control Immediate stop with Ps ≤ 0.1 MPa
105 P11 - o - Indoor Excessively low pressure difference
Stop after P11 retry due to pressure
ratio ε < 1.8 continued for 3
minutes.
106 - o - Indoor
Excessively high discharge gas
temperature
Td ≥ 120 ºC continued for 10
minutes, Td ≥ 140 ºC continued for
5 seconds
129 - o - Indoor
Failure of discharge gas pressure
sensor
Loose, disconnected, broken or
short-circuited connector
130 - o - Indoor
Failure of suction gas pressure
sensor
Loose, disconnected, broken or
short-circuited connector
132 - o - Indoor
Transmission error between
Inverter PCB and Main PCB
Described in inverter abnormal stop
control
134 - o - Indoor
Abnormality of Power Supply
Phase
Reverse/Open Phase
135 - o - Indoor Incorrect PCB Setting
Wrong DSW setting in the case of
Co041
151 - o - Indoor
Excessively low voltage or
excessively high voltage for the
inverter
Described in inverter abnormal stop
control
152 - o - Indoor
Abnormal operation of the current
sensor
Described in inverter abnormal stop
control
153 - o - Indoor
Activation of protection for inverter
instantaneous over current
Described in inverter abnormal stop
control
154 - o - Indoor
Transistor module protection
activation
Described in inverter abnormal stop
control
155 - o - Indoor
Increase in the inverter n
temperature or abnormality
Described in inverter abnormal stop
control
156 - o - Indoor Inverter non operation
Described in inverter abnormal stop
control
157 - o - Indoor
Inverter Communication
abnormality
Described in inverter abnormal stop
control
TROUBLESHOOTING
PMML0335A rev.1 - 04/2016
172
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