4000 Series
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37
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3460006-17_serial series 5000000
10.0 Troubleshooting:
1. Unit connected to power source, power switch on, no light on power switch or Watlow
control.
a)
Verify input voltage on all 3 phase legs.
b)
On initial startup check all 3 phases. The rate chamber monitors for the correct phase
sequence. Switch 2 of the phase wires at the receptacle or power panel.
c)
Check fuses F3-F5 (model 4002/4102), F2-F4 (model 4005/4105), 2.5 amp. Located
on control enclosure back wall. 2.5 amp class CC fuse.
Reaching inside of the cabinet while the unit is energized can be dangerous.
Always unplug the unit and lockout the power supply before performing
maintenance inside of the unit
2. Unit not cooling:
a)
Verify a freeze profile is selected and running.
b)
Verify temperature control set point (lower display) is below actual chamber temperature
(upper display). Cooling step in a profile.
c)
Verify door is closed. The door switch turns off the internal circulation fan, heat and
refrigeration.
d)
If unit has been run repeatedly cold, the evaporator may have iced up. Initiate a defrost
cycle.
e)
Check evaporator fan fuses F 1& F2.
Reaching inside of the cabinet while the unit is energized can be dangerous.
Always unplug the unit and lockout the power supply before performing
maintenance inside of the unit
3. Unit not warming at normal rate:
a)
Verify a warming profile is selected and running.
b)
Verify temperature control set point (lower display) is above actual chamber
temperature (upper display). Warming step in a profile.
c)
Verify door is closed. The door switch turns off the internal circulation fan, heat and
refrigeration.
d)
Check evaporator fan fuses F1 & F2. 7 amp class CC fuse.
Reaching inside of the cabinet while the unit is energized can be dangerous.
Always unplug the unit and lockout the power supply before performing
maintenance inside of the unit
