Check SV4 Valve
refrigeration
Description
When SV4 is energized, suction pressure does not rise within range and discharge pressure does not drop within range.
Activation Conditions
Suction pressure did not rise within range and discharge pressure did not drop within range when SV4 was energized (opened).
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 alarm 00079 Check SV4 Circuit or P00150 Check SV4 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. Repair SV4: Refer to SV4 Checkout Procedure in Section 1.9.6.