Trouble Shooting Guide - Telemark Cryogenics 1200 Instruction Manual

4.3

Trouble Shooting Guide

Symptom Possible Cause
No system power
LCD does not Missing phase
illuminate
Stop/Reset not reset
LCD illuminates but Check LCD for error message
START/STANDBY If unit is running and pre cool is
button does not displayed this is a normal
illuminate condition.
LCD and
START/STANDBY
illuminated but
system does not
start when pressed Over pressure trip has been
triggered
Display message
"OVER
PRESSURE' or
"E1"
LCD and
Start/Standby
illuminates but There has been a momentary
system does not power out check the rest of your
start when it is plant
pressed or LCD
displays gibberish
Check LCD for system status
System runs and
then stops
There has been a momentary
power out. check rest of plant.
Compressor noisy – There is a
Phase error
phase problem.
Check the LT temperature does
not exceed the pre-set value
(40
cool down or when the system
E3 LT High
is under full load. At these
points the heat dissipated to the
water is at its maximum E3 LT
High displayed
Over Pressure
System mechanical over
Display Message
protection triggered
"OVER
PRESSURE"
Telemark Cryogenics Microprocessor Based Cryochillers
o
c) especially during initial
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Corrective Action
Check mains input
Check mains input
Reset by pushing and pulling the Start
stop button.
Consult error message guide for
possible cause and rectify. Probable
cause system pressure or liquid line
temperature.
Check static pressure is in the range
235 - 250psi. Reset trip and restart.
Trip resets with an audible "click"
Reset by pushing and pulling the
STOP/RESET button.
Most common cause of this is either
the value for discharge pressure DP
too high or the suction pressure too
low. Check over pressure trip and
review system balance pressure.
Reset Push Stop/Reset button and
pull to reset
LCD should gives message
Compressor Error. Swap 2 of the
phases reset system and restart.
Most likely cause is, cooling water
inadequate flow or the cooling
capacity of your chiller is too low.
Check water flow in and water flow
out correct orientation.
During initial cool down it is possible
the balance pressure was too high the
cooling water flow is too low /
reversed or there was a problem with
the systems off-load valve. Reset
system and restart if fault persists
allow system to warm up until CT is at
o
least +10 C and check system
balance pressure.
Revision 1.0.7 October 2018