Telemark Cryogenics 3600 - Status LED Troubleshooting Guide (Continued)

Telemark Cryogenics Microprocessor Based Cryochillers
Page
57 of 63 Revision 1.0.7 October 2018
Status LED Status LED Description Status LED Troubleshooting
Information
Yellow Alert
LED
1 Flash
High Discharge Line
Temperature Trip.
Discharge line greater
than 250°F (121°C)
1. Possible loss of refrigeration.
2. Blocked condenser.
3. Discharge line blocked or
Rotolok™ valve closed.
Yellow Alert
LED
2 Flashes
System Trip
Four (4) consecutive
Compressor tripped after
run time of 1 to 15
minutes.
1. Excessive suction pressure of
discharge pressure.
2. Improper wiring (check phase
rotation wiring).
3. Unit over charged. Check
balance pressure
≤ 275 PSI.
Yellow Alert
LED
4 Flashes
Locked Rotor
Compressor is drawing
current but not rotating.
1. Low line voltage.
2. Phase missing. (Check phases
present)
3. Excessive liquid refrigeration in
compressor.
Yellow Alert
LED
6 Flashes
Missing Phase.
Demand signal is present
but current is missing
from one of the phases.
1. Check Wiring.
2. Check voltage on each of the
phases.
3. Failed Contactor.
Yellow Alert
LED
9 Flashes
Low voltage detected.
Control below or has
dropped below 85 volts
1. Low line voltage.
2. Check wiring connections.
Red Alert LED
1 Flash
LOCKED OUT ON:
High discharge line
temperature trip
1. Possible loss of refrigerant
charge.
2. Blocked Condenser.
3. Discharge line blocked or
Rotolok™ valve closed.
Red Alert LED
4 Flashes
LOCKED OUT ON:
4 consecutive locked
rotors detected.
Compressor is drawing
current without rotating.
1. Low line voltage.
2. Check 3 phase voltage supply.
3. Excessive liquid refrigerant in
compressor.
4. Compressors bearing are
seized.
5. Check running current.
Red Alert LED
6 Flashes
LOCKED OUT ON:
10 missing phase
detections
Demand current is
present but current is
missing a phase
1. Check phase rotation.
2. Check phase wiring.
3. Check thermal overload.
4. Check contactor and wiring.
Red Alert LED
7 Flashes
LOCKED OUT ON:
1 reverse phase
detected.
Demand signal is present
but phase current
sequence is correct
1. Check phase wiring order.
2. Check voltage present an all
phases.
3. Compressor current draw too
low.