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JFT Series Technical Manual 7610-002-77-38
Issued: 03-16-2006 Revised: N/A
SECTION 3: PREVENTATIVE MAINTENANCE
24
MONTHLY (CONTINUED)/QUARTERLY/ANNUAL MAINTENANCE
found. Correct any deficiencies before returning the unit to an operating status.
5. Verify that the conveyor operates in both high and low speed. Start the machine as normal, ensuring that all personnel are
clear. Put the machine in low speed using the Speed Selector Switch located on the front panel. Allow the unit to operate nor-
mally for five minutes ensuring that the speed appears to remain constant. Without turning off the unit, place the switch in the
high speed position and allow to run for another five minutes, checking for a constant speed. Once completed, place the selec-
tor switch in the desired position and turn the unit off.
6. Inspect the vacuum breaker to ensure that the valve disc is not damaged, limed up or misaligned. With power and water
secured to the dishmachine, verify that the small disc inside the vacuum breaker moves freely and seats well.
7. Inspect and clean the steam supply y-strainer on steam models.
Quarterly:
1. Check the amperage draw for each connection point; this should be done only by qualified electricians since this involves
working with energized components. Compare the amperage draw for each section to what is listed on the data plate and/or
to maintenance records. Any significant change in amperage draw could be indicative of a major component (motor or heater)
failing and should be investigated further to determine the exact cause of the change.
2. Verify that the machine is maintaining proper temperatures as indicated on the machine data plate. Start the machine and
allow it to run in low speed with the exhaust fan and blower turned on. Do not load any ware onto the machine. Let run for
approximately fifteen minutes before starting to observe temperatures. Compare the temperatures to what is listed on the
machine data plate. If there is a discrepancy, investigate and correct.
3. Verify that the dishmachine is still level. A level machine is required for peak efficiency as water levels can be affected due
to any sort of inclanation. This should be done with the machine off, cooled down and drained.
4. Delime the electric booster heater. In order to maintain the electric booster heater at its optimum performance level, it will be
required to remove lime and corrosion deposits on a frequent basis. To delime, please refer to the instruction manual that came
with your particular electric booster heater. A deliming solution should be available from your detergent supplier. Read and fol-
low all instructions on the label of the deliming solution.
Annually:
1. Jackson recommends that at least once a year that a general, overall inspection of the dishmachine take place. With the unit
drained and power secured at the service breaker, service personnel should look for any items that should be addressed that
may not be specifically pointed out in the preventative maintenance procedures. Examples of things to look for include:
a. Loose screws
b. Frayed wires
c. Broken lights or switches.
d. Torn curtains
Experience will dictate to service personnel specific items that should be examined and Jackson encourages scheduling
inspections as often as needed to ensure certain problems do not become catastrophic.