EarthLinked SCWD-024-1C, Quick Start Instructions

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SCWD-QS (12/16) Page 21
Flash Codes
– Single Phase
LED Flash Codes
A Red LED indicator will flash under the following conditions. [NOTE: LED fault indicator is turned
off in normal running mode.]
a) Rapid Flash (10 / sec) : Low Voltage
b) Triple Flash Every Three Seconds (3 / 3 secs): Lockout on Three Failed Starts
c) Slow Flash (1 / 3 secs): Lockout on Over Current
d) Slow Steady Flash (1 / sec): Cycle Delay / Fault Mode
Flash Code (Rapid Flash (10 / sec) : Low Voltage)
-
Displayed for “Low supply voltage” before or after a softstart.
- If Low voltage is detected before a start, a re-start is attempted after 50 seconds.
- If Low voltage is detected after a start, a re-start is attempted after 3 minutes.
Flash Code (Triple Flash every three seconds (3 / 3 secs): Lockout on Three Failed Starts)
- Displayed aft
er failure to start on “Three consecutive start attempts”.
- Re-start is attempted after 50 minutes.
- Standard lockout period is revised to 3 minutes after a successful start.
In circumstances where the compressor may have seized or is unable to startup due to failure of
other components in the HVAC system, the software will check for three consecutive failed starts.
On the third sequential failed start, the program goes into Lockout for 50 mins. On failing to get a
good start even after 50 mins, it will re-attempt start again after duration of 50 mins. Once a good
start is eventually achieved, it will reset the hardstart counter and will require 3 failed starts again
to force it back into Lockout mode. Lockout can be cleared anytime through a power reset of the
SureStart device.
Flash Code (Slow Flash (1 / 3 secs): Lockout on Overcurrent)
-
Displayed for “Overcurrent” in running mode of the compressor motor.
-
Overcurrent limit is “25A for 08-16A version” and “50A for 16-32A rated version”.
- Also displayed, if internal Klixon of the compressor trips out on overheat.
- Re-start is attempted after 10 minutes.
To limit the current in compressors from extending abnormally beyond its stated capacities,
SureStart is also equipped with Overcurrent limit protection. For models rated from 16-32A,
SureStart is designed to trip out in overload conditions exceeding 50A. In smaller models, it is
designed to cutoff power to the compressor if the current drawn exceeds 25A. On overcurrent
lockout, SureStart attempts a re-start automatically after 10 minutes.
Both failed start lockout and overcurrent limit protection have been designed to prevent the
compressor from drawing abnormal currents in conditions not feasible for the compressor
operation.
Flash Code (Slow Steady Flash (1 / sec): Cycle Delay / Fault Mode)
-
Displayed for “Cycle delay” between two consecutive softstarts or other faults mentioned
below.
- Re-start is attempted after a default period of 3 minutes.
- Other possible reasons for this Fault mode indicator can be due to
- incorrect wiring during installation,
- a failed Softstart attempt,
- intermittent power loss (duration longer than 100ms),
- frequency out of range, or
- failed run capacitor.