Hitachi YUTAKI Series Instruction And Operation Manual page 184

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