Fri-Jado Cold MCC, Service Manual

Page: 75 / 147

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