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Notes:
1
This signal is for Fresh Start, Normal Start Program and any start request delay.
2
PHE Vapor In/Out Temperature Sensor is not applicable in XJAM condensing unit (MT units).
All error/warning messages are priority-ranked from highest to lowest. If unit is initially powered on, the diagnosis
module will show signal similar to the below example:
© 2017 Emerson Climate Technologies, Inc.
Table 8 - Diagnostics Module Display
LED1 – Unit Status
Idle (Set Point or Low Pressure Cut-Out Rached)
Run
1
About to Start
Defrost
Unit Trip
Unit Lockout
LED1 – Unit Status
No error/warnings
Compressor Phase Error (Wrong Phase Sequence/Loss of
Phase)
Compressor Inside Internal Motor Protector Trip
Compressor Over Current
Discharge Gas Overheat (High Discharge Temperature)
Compressor High Pressure Cut Out
Not Used
DLT Thermistors Failure
Ambient Temperature Sensor Failure
Mid-coil Temperature Sensor Failure
PHE Vapor In Temperature Sensor Failure or over range
PHE Vapor Out Temperature Sensor Failure or over range
System Liquid Flood Back Warning
Figure 8 - Diagnostics Module Start Up Information
Status
Status
27
AE5-1377 R3
2
2
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