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Service Menu Parameters
8.4
Service-Diagnostics / Service Mode Screens
Service-Diagnostics / Service Mode provides troubleshooting tools including alarm counters, manual
mode, readable analog and digital inputs/outputs and other diagnostic features.
Figure 127
Diagnostics/service mode screen, page 1 of 8
S302 HP Alarm Code C1/C2—Compressor 1 high-pressure alarm code is the left hand parameter
and Compressor 2 is the right hand parameter: 0 = no alarm; 2 = high-pressure alarm active.
S303 HT 1 Alarm Counter—Compressor 1 high temperature event alarm counter. If more than five
events occur in a rolling 4 hour period, then the compressor will be locked out.
S304 HT 2 Alarm Counter—Compressor 2 high temperature event alarm counter. If more than five
events occur in a rolling 4 hour period, then the compressor will be locked out.
S305 LP Alarm Code C1/C2—Compressor 1 low-pressure alarm code is the left hand parameter and
Compressor 2 is the right hand parameter: 0 = no alarm; 2 = low-pressure alarm active.
S306 Discharge Temp. C1—Current compressor discharge temperature reading (available only on
compressors equipped with discharge temperature thermistors).
S307 Discharge Temp. C2—Current compressor discharge temperature reading (available only on
compressors equipped with discharge temperature thermistors).
S308 Actual LP1 /LP2 Pressure—Current low side refrigerant pressure reading in gauge for
Compressor 1 on the left hand side and Compressor 2 on the right.
S309 Actual HP1/HP2 Pressure—Current liquid line refrigerant pressure reading in gauge for
Compressor 1 on the left hand side and Compressor 2 on the right (available only on water-cooled or
glycol units equipped with motorized ball valves).
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Liebert® iCOM®