Troubleshooting - Waeco COOLMATIC MDC-50 Bedienungsanleitung

Troubleshooting

11 Troubleshooting
Error code LED
The error code LED indicates various faults with a different number of
flashes. One flash lasts a 1/4 of a second. The error codes are repeated
every 4 seconds.
Number of
Error type
flashes
1 Battery protection shut
down
2 Fan overvoltage shut
down
3 Motor start error
4 RPM too low
5 Thermal shut down of
the electronic unit
Compressor does not run
Fault
U = 0 V
T
≤ U
U
T ON
Start attempt with
≤ U
U
T OFF
Start attempt with
≤ U
U
T ON
U Voltage between the positive and negative electronic terminals
T
U Switch-on voltage of the electronics
ON
34
Possible cause
The battery voltage is outside of the set range
The fan is consuming more than 0.5 A on average
or 1 A peak values from the electronic unit
The rotor is stuck or the differential pressure in the
cooling system is too high (> 5 bar)
If the cooling system is overloaded, the minimum
speed of the motor of 1900 RPM cannot be
maintained
If the cooling system is overloaded or the ambient
temperature is too high, the electronic unit
becomes too hot
Possible cause
The connection between the battery
and the electronics is interrupted
Main switch defective (if installed)
Additional supply line fuse has blown
(if installed)
Battery voltage is too low
Loose cables
Poor contact (corrosion)
Battery capacity too low
Cable cross section too low
Ambient temperature too high
Insufficient ventilation
Condenser is dirty
Fan defective (if installed)
COOLMATIC MDC Series
Remedy
Establish a connection
Replace the main switch
Replace the fuse
Charge the battery
Establish a connection
Replace the battery
Replace the cable
(fig. 7, page 5)
–
Move the cooling device
Clean the condenser
Replace the fan