13. Troubleshooting
TCGB0075 rev.0 - 11/2012
154
LCD dis-
play
7 segment
display
Origin Detail of abnormality Main factors
57 57
Outdoor
Abnormality of fan motor protection (DC fan
motor)
59 59
Outdoor
Inverter n temperature thermistor abnor-
mality
Loose, disconnected, broken or short-circuited
connector
63 63
Comuni-
cation
Transmission error between central and
indoor communication
Indoor fuse meltdown, indoor/central connec-
tion wiring (breaking, wiring error, etc.)
EE-
(100)
EE
Outdoor Compressor factor alarm
Alarm to notify damage to compressor occurs 3
times within 6 hours
70 70
1st cycle Hydraulic alarm
Water pressure or water ow is not detected in
the hydraulic cycle
73 73
1st cycle
Mixing over-temperature limit protection for
mixed circuit
Circuit 2 supply temperature > Target tempera-
ture + offset
74 74
1st cycle Unit over-temperature limit protection
Water supply temperature (Two) is 5ºC more
than maximum water circuit temperature for 20
sec.
75 75
Hydraulic
Freeze protection by cold water inlet tempe-
rature detection
The inlet water temperature is lower than 2 ºC.
76 76
Hydraulic
Freeze protection stop by indoor liquid tem-
perature thermistor
77 77
1st cycle Opentherm communication failure
No Opentherm communication for a continuous
period of 1 minute
78 78
1st cycle RF communication failure
There is no communication for 1 hour with one
or two RF receivers which are bound to the
RF-Bridge.
79 79
1st cycle
- outdoor
Unit capacity setting error
There is no concordance between indoor out-
door unit capacity
80 80
1st cycle
- LCD
LCD H-link 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.)
101 02↔H1
2nd cycle Activation of high pressure switch The high pressure (Pd) is higher than 3.0 MPa.
102 02↔h1
2nd cycle
Activation of protection control for excessi-
vely high pressure
The high pressure (Pd) is higher than 2.78
MPa during 10 seconds.
103 02↔L1
2nd cycle
Activation of protection control for excessi-
vely low pressure
The suction pressure (Ps) is lower than 0.15
MPa during 1.5 minutes.
104 02↔1
2nd cycle Activation of low pressure control
The suction pressure (Ps) is lower than 0.1
MPa during 3 seconds.
105 02↔E1
2nd cycle Excessively low pressure difference
The pressure ratio calculated from high pressu-
re (Pd) and low pressure (Ps) is lower than 1.8
MPa during 3 minutes.
106 02↔61
2nd cycle Excessively high discharge gas temperature
The discharge gas temperature is increased to
120 ºC during 10 minutes or is higher than 140
ºC at least 5 seconds.
124 21
2nd cycle
Failure of refrigerant evaporation temperatu-
re thermistor
The refrigerant evaporation temperature ther-
mistor is short-circuited or cut.
125 22
2nd cycle Failure of ambient temperature thermistor
The ambient temperature thermistor is short-
circuited or cut.
126 23
2nd cycle
Failure of discharge gas temperature ther-
mistor
The discharge gas temperature thermistor is
short-circuited or cut.
127 24
2nd cycle
Failure of refrigerant liquid temperature
thermistor
The refrigerant liquid temperature thermistor is
short-circuited or cut.
128 26
2nd cycle
Failure of suction gas temperature thermis-
tor
The suction gas temperature thermistor is
short-circuited or cut.
129 27
2nd cycle Failure of discharge gas pressure sensor
The high pressure sensor is short-circuited or
cut.
130 28
2nd cycle Failure of suction gas pressure sensor
The low pressure sensor is short-circuited or
cut.
132 04
2nd cycle
Abnormal transmission between Inverter
PCB and Main PCB
The communication between Main PCB
(PCB1) and Inverter (DIP - IPM/ISPM) is not
performed correctly during 30 seconds.
134 05
2nd cycle Abnormality of Power Supply Phase
The power source phases are reversely con-
nected or one phase is not connected.
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