62-11785 7–24
00074 PHASE REVERSED
• ACTIVATION: The Stop/Run Switch is ON and the system cannot properly detect the phase.
• UNIT CONTROL: Required Shutdown.
• RESET CONDITION: Auto reset when and the phase reversed switch = phase reverse okay for 2 sec-
onds. Alarm may be manually reset using the display mounted keys or by turning the unit off, then back
on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, the active
alarm should clear itself (see reset condition above). Operate the unit through the appropriate modes to see if
any active alarm occurs. Continue with the steps below as necessary.
CORRECTIVE ACTIONS:
1. Check Circuit Breaker on The Main External Power Supply
a. Check the 30A supply circuit breaker to make sure it is on.
b. Check the voltage in the plug. 460V / 3 / 60Hz.
2. Check for Power in the Control Box, PSCON or PSCON2
a. Check PSCON and PSCON2. Use Component Test Mode (Section 5.2.4) to test. Refer to
Section 2.10 for amp values. View current draw in Component Test Mode screen.
b. Check for voltage at PSCON L1-L2, L2-L3, L1-L3. All three readings must be 460V +
10%.
c. Check for voltage at PSCON2 L1-L2, L2-L3, L1-L3. All three readings must be 460V +
10%.
3. Check PSCON and PSCON2 - Use Component Test Mode (Section 5.2.4) to test. Refer to Section 2.10
for amp values. View current draw in Component Test Mode screen.
4. Check Current Transformer (CT)
a. Check current value. Power up the APX Control System in PC Mode. (Refer to Section 5.3.2.)
Check Unit Data. Must be -2.0 to 1.5A with no load.
b. Check CT power from main microprocessor. +5 VDC from terminal 2MM-29 to PCM-31.
c. Check CT ground to main microprocessor. Check wiring from terminal 2MM-23 to PCM-30.
d. Check CT signal to main microprocessor. Check wiring from terminal 2MM-12 to PCM-29.
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