Page 17
Troubleshooting
Operation
Condenser unit is OFF
The mains isolating switch on the wall,
circuit breaker or fuses are OFF at the power
board
Turn isolating switch, circuit breaker or
fuses ON
The main switch of the unit is OFF
Electrical wiring damaged
Condenser unit broken
Faulty electronic controller
Ambient air entering the units
Exhaust fan above the unit
Baffle fully closed
Warm items in unit
Air not circulating
Too many items in the unit (overloaded)
Items obstructing air vents / grills
Defrost cycle is ON / just finished
Evaporator coil fins blocked
Evaporator coil iced up
Temperature probe broken / disabled
Set point temperature too high
Temperature probe damaged
Evaporator fans not operating
Condenser unit overloaded (remote units)
Condenser coil blocked (remote units)
Undercharge/Overcharge of refrigerant
Faulty electronic controller
Set point too low
Temperature probe broken/disabled
Unit does not operate/start
Unit is too warm
Unit is too cold
Faulty electronic controller
Continuous cycle setting ON (integral units)
Turn ON condenser unit
Turn the main switch ON
Replace / Fix electrical wiring
Replace / Fix refrigeration unit
Replace controller
Move away from air flow
Move unit / exhaust fan
Open baffle
Pre-chill / Remove items / Wait 30min
for items to chill
Remove some items / Clear air vents/Grills
Remove some items
Re-position items
Wait 30min for cabinet to cool
Clean fins / Run defrost cycle
Adjust defrost cycle to match
environment / Remove warm items / Fix or
replace door seals
Replace / Enable probe
Adjust the set point temperature
Replace temperature probe
Replace / Fix fans
Replace with bigger condenser unit /
Remove some refrigerator units from the
condenser unit
Remove dust and debris
Add/remove refrigerant
Replace controller
Adjust set point temperature
Replace / Enable probe
Replace controller
Turn OFF continuous cycle)
O
O
O
T
T
T
Main circuit board is hot
Replace / Fix circuit board
T
Refrigeration circuit board(s) is hot
Replace / Fix circuit board(s)
T
O
O
O
O
O
O
O
O
O/T
T
T
T
T
T
T
T
T
T
T
Direct sunlight
Block sunlight, window tinting/shades
O
T
T
T
Problem
Possible Causes
Task
Possible Corrective Action
(O) = Operator
(T) = Technician Task
Summary of Contents for W.CFC23
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