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Rev 3 Service Manual MCC Hot / Cold 2021
Page 75
10.3
Trouble Shooting Analytical description
Description of part
Symptoms
Possible causes
Solution / Action
Contactor
Contactor does not
work
Wiring
Coil malfunction
Contact burned
Check wiring
Check resistance of coil
+/- 525Ω
Check the contacts
Replace contactor
Heating element
(HOT unit)
Unit is not reaching the
set temperature
Wiring
Element malfunction
Air flow not
Working, Fan’s not
turning
Check wiring
Check power on elements per
shelf
Check current with AC current
tester
Check Resistance (refer 6.4)
Replace element
Check wiring
Check power on fans per shelf
Replace Air box / Power Supply
Cooling engine
(COLD unit)
Cooling system does
not initiate (compressor
doesn’t run
Wiring cooling
Engine
Compressor
Malfunction
Check wiring
Replace cooling engine
Tumble switch
Light, heating or cooling
does not switch on
Wiring
Contact burned
Check wiring
Check the voltage on “in“ and
“output“
LED
Light does not turn on
Wiring
LED broken
Led driver defect
Check Wiring
Replace LED
Replace LED driver
Electronic thermostat
Display does not light
up
The unit is not reaching
the set temperature
Wiring
Loose sensor
Thermostat
Malfunction
Thermostat setting
Check wiring
Check sensor
Replace thermostat
Check parameters
Содержание Cold MCC
Страница 20: ...Page 20 Rev 3 Service Manual MCC Hot Cold 2021 Circuit diagram evaporator tray...
Страница 21: ...Rev 3 Service Manual MCC Hot Cold 2021 Page 21 Wiring diagram evaporator tray...
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Страница 139: ...Rev 3 Service Manual MCC Hot Cold 2021 Page 139 17 0 Electrical schematics MCC Cold Self Serve...
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