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62-11039
7-41
Alarm
NO.
Steps
ALARM / CAUSE
CORRECTIVE ACTION
76
CONDENSER MOTOR OVERHEATED
•
TRIGGER–ON: One or both of the condenser fan motor (IPCDM1 AND 2) in Compartment One circuit is
open.
•
UNIT CONTROL: Engine operation: engine and unit shutdown and alarm Standby operation:
•
UNIT CONTROL: Engine operation: engine and unit shutdown and alarm. Standby operation:
refrigeration system shutdown and alarm with PSCON still energized.
•
RESET CONDITION: Auto Reset when motor overload input is within limits, or change to engine
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 (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.
1.
Check Condenser Fan Motor Contactor
a. Inspect the three contacts behind the
top cover
If the contactor buttons are blue due to chattering caused
by a defective IP, replace the contactor.
b. Check tightness of the contactor wire
connections
Tighten with screwdriver and check for discoloration of
wires.
2.
Check Condenser Fan Motors
a. Disconnect power plug at motor
Test IP circuit for continuity using ohmmeter
If open, remove and replace motor
If closed, then an intermittent IP circuit is suspect. Check
phase to phase and phase to ground for short or open
circuits See Section 2.13.
If motor tests good, check the DC IP circuit to
microprocessor.
3.
Check Motor Operation
a. Turn the unit ON
Check current on each phase (must be less than shown
on Section 2.13).
Check voltage on each phase (must be at least 440VAC).
Содержание VECTOR 1800 MT
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Страница 310: ...10 8 62 11039 BASED ON ENGINEERING SCHEMATIC 62 60926 REV G NEXT SHT ...
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