Fri-Jado MCC 120, Service Manual, Page: 66 / 105

Page 66 Service Manual MCC Cold US 20220700
9
.0
Trouble Shooting
9.0.0 Problems which can be checked by user
Each user can check the following points as mentioned in the user manual:
• Is the power supply OK?
• Check the fuses and the earth leakage switch in the meter cup board.
• Are all the switches in the correct “on” position?
Item Malfunction Possible action
Unit Unit does not work • Check the power supply.
• Are all switches in the correct position.
Unit Display shows error code • Contact your supplier or service agency.
Lamp Does not light up • Switch ON.
Mains cord Damaged • Replace.
Window Damaged • Replace.
9.0.1 Cold units
WARNING
All service operations on the refrigeration system and gas charging must be performed by
fully certified and qualified persons, in a well ventilated environment.
9.0.2 Replace the mains cord
WARNING
Hazardous electrical voltage.
If the mains cord is damaged, it must be replaced by a fully certified and qualified person,
in order to avoid hazards.
10.0.3 Error codes and solutions
See page 69
NTC sensor testing (Cold Unit)
1. Remove wiring from the sensor.
2. Connect a temperature tester to the probe of the sensor for comparison.
3. Test the probe with a Ohm tester (range 5kΩ til 100kΩ).
Temperature Resistance kΩ
⁰F ⁰C +/- 500 Ohms
-4 -20 67,77
14 -10 42,47
32 0 27,28
50 10 17,96
68 20 12,09
77 25 10,00