Shellab SRI20-2 - Manual (Page 12)

12
Unit won't cool
If the compressor is running:
1/ see if condenser is cold but free of ice.
2/ be sure that fan is circulating air in the chamber and over the
compressor.
3/ confirm proper sensor location and operation.
4/ look for leaks in the chamber or around the door gasket.
5/ assure ample room around the unit as described in Installation section
2.2.
6/ adjust calibration on controller, see section 5.6.
7/ compare ambient specifications to Unit specifications in section 8.0
8/ If 1 through 7 has been tried and still not functioning correctly, call
customer service.
If compressor isn’t running:
9/ if too cold ins
ide adjust “cold control”
- on 2020 is located outside on bottom right rear
- on 2030 is located inside top center between two fans
10/ check for non-operating relay
11/ confirm that compressor cooling fan motor is operable.
12/ check if motor has voltage to it.
13/ see if refrigeration is running too hot and thermal cutoff activated:
a- dirty coil or poor circulation
b- coil next to heat source
C - Ambient temperature too high
Ice build up in chamber
1/ Search for leak in door gasket.
2/ door being opened too often.
3/ open container inside the chamber.
4/ check tightness of seal around all chamber wire and plumbing access
to outside.
5/ turn defrost switch on, Note: defrost switch must be turned off for best
temperature uniformity; If no defrost option available, call Customer
Service.
Making noise
1/ assure that fan is not miss-aligned.
2/ Steady internal clicking may be broken spring or valve
– call Customer
Service.
MECHANICAL
Motor doesn't move
1/ if shaft spins freely: check connections to motor and check voltage to
motor.
2/ if shaft rubs or is frozen, relieve binding and retest.
Motor makes noise
1) Make sure that the fan or blower wheel is not contacting its housing.
Adjust the motor mounting bracket position to re-center the fan or blower
wheel, if necessary.
2) Check the fan or blower wheel for damage or out of balance condition.
Replace the fan or blower wheel if it is damaged or out of balance.
3) Turn the motor shaft to make sure that it spins freely. If it binds or the
bearings make a rubbing or scrapping sound then replace the motor.
Door not sealing
1/ Confirm that unit has not been damaged and body is not square.
Water leaking
1/ If leaking inside: dry chamber, run at temperature with door open.
Check all seams with flashlight including front face.
2/ If leaking outside: dry out and see if leak repeats and find source of
leak. Sources may include: fittings that need tightening, condensation
due to missing insulation or evaporate pan needs to be emptied.