P4 Tests - High Speed Evaporator Fans Current Draw: High speed evaporator fans are turned on, then off. Current draw must fall within specified range and measured current changes must exceed specified ratios. No other system components will change state during this test.
NOTE
If unit configured for single evaporator fan operation and either AL11 or AL12 is active at the start of either test, the test will fail immediately. If AL11 or AL12 become active during the test, the test will fail upon conclusion of the test
NOTE
If unit configured for single evaporator fan operation and either AL11 or AL12 is active at the start of either test, the test will fail immediately. If AL11 or AL12 become active during the test, the test will fail upon conclusion of the test
| P4-0 High Speed Evaporator Fan Motors On |
| Evaporator fans start in the off condition, current draw is measured, then high speed evaporator fans will be turned on. After 60 seconds the current draw is measured again. The change in current draw is then recorded. Test passes if change in current draw in the specified range AND measured current changes exceed specified ratios. If the three phase motors are configured IN, the change ratio test is skipped. |
| P4-1 High Speed Evaporator Fan Motors Off |
| High speed evaporator fans are then turned off. After 10 seconds the current draw is measured. The change in current draw is then recorded. Test passes if change in current draw test is in the specified range. |
