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49
8.6.2 - Compressor alarms
The following table presents a list of subcodes associated with
compressor failure.
Jbus
code*
Code** Alarm description
Possible cause
Action taken
Reset type
106 (A)
125 (B)
xx01
Compressor Motor temperature too high
Motor/wiring fault
Unit shuts down
Manual
107 (A)
126 (B)
xx02
Compressor Motor temperature out of range
Probe defective or incorrect wiring
Unit shuts down
Manual
108 (A)
127 (B)
xx03
Compressor High pressure switch protection
Coil fouled, lack of condenser flow,
condenser valve blocked, fan circuit
fault, high entering air or condenser
water temperature
Unit shuts down
Manual
109 (A)
128 (B)
xx04
Compressor Over current
-
Unit shuts down
Manual
110 (A)
129 (B)
xx05
Compressor Locked rotor
Mechanical compressor fault, motor fault
or defective compressor slide valve
Unit shuts down
Manual
111 (A)
130 (B)
xx06
Compressor Phase loss L1
Power supply wiring fault
Unit shuts down
Manual
112 (A)
131 (B)
xx07
Compressor Phase loss L2
Power supply wiring fault
Unit shuts down
Manual
113 (A)
132 (B)
xx08
Compressor Phase loss L3
Power supply wiring fault
Unit shuts down
Manual
114 (A)
133 (B)
xx09
Compressor Low current alarm
Detective contactor or capacity fault
Unit shuts down
Manual
115 (A)
134 (B)
xx10
Compressor Y delta starter current increase failure
alarm
Incorrect wiring or no power for the delta
contactor
Unit shuts down
Manual
116 (A)
135 (B)
xx11
Compressor Contactor failure
Incorrect wiring or defective contactor or
TCPM board
Unit shuts down
Manual
117 (A)
136 (B)
xx12
Compressor Unable to stop motor
Incorrect wiring or defective contactor
Unit shuts down
Manual
118 (A)
137 (B)
xx13
Compressor Phase reversal
-
Unit shuts down
Manual
119 (A)
138 (B)
xx14
Compressor MTA configuration fault
MTA configuration incorrect or defective
TCPM board
Unit shuts down
Manual
120 (A)
139 (B)
xx15
Compressor Configuration switch mismatch
Configuration switch S1 incorrect wiring
or defective TCPM board
Unit shuts down
Manual
121 (A)
140 (B)
xx16
Compressor Unexpected switch setting change
As above
Unit shuts down
Manual
122 (A)
141 (B)
xx17
Compressor Power on reset
Verify that power supply cuts have
occurred
Unit shuts down
Manual
123 (A)
142 (B)
xx18
Compressor UL 1998 critical section software error Power network noise or defective TCPM
board
Unit shuts down
Manual
124 (A)
143 (B)
xx19
Compressor UL 1998 current measure dual channel
mismatch
Power network noise or defective TCPM
board
Unit shuts down
Manual
* Jbus code: (A) refers to compressor A, (B) refers to compressor B
** Alarm code: XX stands for compressor (11 = compressor A , 21 = compressor B)
8 - DIAGNOSTICS