7–23 62-11785
00073 NO POWER-CHECK POWER CORD
• ACTIVATION: The unit is set to operate AND no AC power; incoming voltage at the High Voltage Trans-
former (HVT) is less than 300VAC.
• UNIT CONTROL: The refrigeration system will shutdown (because of the loss of power) with the alarm on
and PSCON still energized.
• RESET CONDITION: Auto Reset when AC power is restored (HVT shows above 340 VAC) or the alarm
may be manually reset via keypad or by turning the unit off, then back on.
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 that the 30A supply circuit breaker is on.
b. Check the voltage in the plug. 460V / 3 / 60Hz.
2. Check Power Cord
a. Inspect connections in the socket and the plug. Connections must be tight.
b. Inspect the cable. Cable must not be frayed, cut or damaged.
3. Check For Power In The Control Box
a. Check for voltage at PSCON L1-L2, L2-L3, L1-L3. All three readings must be 460V +
10%.
b. Check for voltage at PSCON2 L1-L2, L2-L3, L1-L3. All three readings must be 460V +
10%.
4. Check Connections - Check for bad connections in the control box. Connections and wire crimps must
be tight.
5. Check CCB1 - Check for voltage between 1CCB35 & 1CCB19. Voltage should be 0.766 V +
10%.
6. Check CCON - Check for continuity between L1 or L2 to HVT. Check for open or short.
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