Carrier VECTOR 1550 Series - Power-Check Power Cord

62-61753-21
7-43
Alarm
NO.
Steps
ALARM / CAUSE
CORRECTIVE ACTION
73 NO POWER-CHECK POWER CORD
 TRIGGER-ON: In standby mode AND no AC power
 UNIT CONTROL: Engine operation: this alarm will not activate in engine operation.
Standby operation: if the "No Power" Configuration is set for "Installed and
Shut Down" the refrigeration system will shut down with the alarm on and
PSCON still energized.
If the "No Power: Configuration is set for "Switch to Engine" and the "No
Power-Switch to Diesel" functional parameter is set to "Yes", the unit will
remain off for 5 minutes, then restart on Engine power.
 RESET CONDITION: Auto Reset when AC power is present AND Configuration is set to shutdown or
if the user changes the switch to standby operation or alarm may be manually reset via keypad 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 (refer to reset condition above). Operate the unit through the appropriate modes to see if
any active alarm occurs. Continue with the steps below as necessary.
1
Check Circuit Breaker On The Main Supply
a. Check circuit breaker.
30A supply circuit breaker - Must be on.
b. Check the voltage at the plug.
Nominal 380V/3P/50Hz.
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 nominal 380V.
b. Check for voltage at PSCON2 L1-
L2, L2-L3, L1-L3.
All three readings must be nominal 380V.
4
Check Connections
a. Check for bad connections in the
control box.
Connections and wire crimps must be tight.
5
Check Phase Reversal Module (PRM)
a. Check for voltage at 5MP04.
Must be +12 VDC.
b. Check Phase Reversal Module for
correct operation.
Replace PRM if defective.