Check SV1 Valve
refrigeration
Description
When SV1 is de-energized or energized, discharge pressure does not change as expected in Heat Pretrip or Cool Pretrip.
Activation Conditions
Discharge pressure did not decrease when SV1 was de-energized (opened) as expected in Heat Pretrip, or discharge pressure did not increase as expected when SV1 was energized (closed) in Cool Pretrip.
Unit Behavior
Alarm only.
Reset Conditions
Auto reset if Pretrip is started again or alarm may be manually reset using the display mounted keys or by turning the unit off then back on again.
Corrective Actions
1. Check for Alarms: Check for 00078 Check SV1 Circuit or P00148 Check SV1 Circuit. Alarm conditions must be corrected and the alarm cleared to continue. 2. Check System Pressures: Check and compare compressor discharge and suction pressures with those shown in unit data. Refer to Section 1.9.12 for instruction on comparison. 3. Check SV1: Refer to SV1 Checkout Procedure in Section 1.9.5.