RAM DBS II User Manual

RAM DBS II
Refrigeration Solid State Starter
ALARM CONDITION
1. Current Unbalance
SOLUTION
Check for voltage balance between
phases. Customer must consult power
supplier if balance is abnormal.
Compare current reading on DBS display
to reading of clamp-on ammeter for
accuracy.
Load balance on customer's system
must be re-distributed.
Adjust current unbalance and current run
delay setpoints. See Table 13, Section 9.
Replace DBS control board.
POSSIBLE CAUSE
Current between two phases
exceeds the setpoint value longer
than the time delay setpoint.
Electrical loads on power supply
not distributed equally among
phases.
DBS setpoints not set correctly or
according to actual conditions.
Abnormal SCR operation due to
defective DBS control board.
25
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LED STATUS
CONDITION
RELAY STATUS
ALARM
ON
ON
ON
ON
ON
ON
ON
OFF
ON
SHUNT
TRIP
ON
OFF
ON
OFF
OFF
OFF
OFF
OFF
OFF
LED and Relay Status
for Alarms and Trip Conditions
TABLE 11
READY
(Green)
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
N/A
RUN
(Green)
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
N/A
ALARM
(Yellow)
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
ON
RUN
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
N/A
BYPASS
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
N/A
FAULT
(Red)
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
TRIP
SHORT CIRCUIT
THERMAL OVERLOAD
SHORTED SCR
PHASE REVERSAL
PHASE LOSS
JAM PROTECTION
HEATSINK OVERTEMPERATURE
PLL FAILURE
ALARM
CURRENT UNBALANCE
TABLE 10 (continued)
7.3 Alarm Conditions
7.0 Troubleshooting
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RAM DBS II Specifications

General

Brand	RAM
Model	DBS II
Category	Controller
Language	English