Vertiv Liebert iCOM DP400/500, Installer/User Manual

Page: 106 / 180

Low Pressure Status
Status of compressor’s low pressure switch.
Status HT1
Count of times compressor is powered off for high scroll temperature.
11.4.2 Resetting High Pressure Alarm Code
When a high pressure problem has caused a compressor to lock off, resetting the High Pressure Alarm Code to zero unlocks
the compressor for operation.
NOTE: Cycling main power of the cooling unit will also unlock the compressor.
1. Touch , then > Diagnostic/Service > Diagnostics > Compressor Circuit N in the Category list (where
N is the circuit number).
2. On the COMPRESSOR CIRCUIT panel, touch Set to Zero next to High Pressure Alarm Code, then touch Save .
The code is reset and the compressor can now operate.
11.4.3 Resetting Low Pressure Alarm Code
When a low pressure problem has caused a compressor to lock off, resetting the Low Pressure Alarm Code to zero unlocks
the compressor for operation.
NOTE: Cycling main power of the cooling unit will also unlock the compressor.
1. On the Service menu, touch Diagnostic/Service > Diagnostics .
The DIAGNOSTICS panel opens.
2. Touch Compressor Circuit N in the Category list (where “N” is the circuit number) .
3. On the COMPRESSOR CIRCUIT panel, touch Set to Zero next to Low Pressure Alarm Code, then touch Save .
The code is reset and the compressor can now operate.
11.4.4 Resetting High-temperature Alarm Counter
1. Touch , then > Diagnostic/Service > Diagnostics > Compressor Circuit N in the Category list (where
“N” is the circuit number) .
2. On the COMPRESSOR CIRCUIT panel, touch Set to Zero next to High Temperature Alarm Counter, then touch
Save . The code is reset and the compressor can now operate.
11.5 Diagnosing Electronic Expansion Valve Issues
1. Touch , then > Diagnostic/Service > Diagnostics > Electronic Expansion Valve N in the Category
list.
The ELECTRONIC EXPANSION VALVE panel displays.
2. Refer to Diagnostics—Electronic Expansion Valve Options on the facing page for descriptions of diagnostic
options.
Vertiv™ | Liebert® iCOM™ Installer/User Guide
98