Fault Conditions - Thermoscreens T Series Operation And Maintenance

18. FAULT CONDITIONS

18.1 Overheat safety cut-out
An overheat fault in electric heated units may cause the overheat safety cut-out(s) to operate.
This is indicated by flashing LEDs on the remote control and a red status LED on the Ecopower PCB
inside the air curtain.
Before resetting ensure there is adequate air flow from the air curtain and the unit has been
commissioned as per Section 16.
To reset a overheat safety cut-out trip:
Step 1 Switch off the electrical supply to the air curtain.
Step 2 Allow time for the air curtain to cool down; typically 10 minutes.
Step 3 Switch on the electrical supply to the air curtain.
Step 4 Press the Auto button on the Ecopower remote control 4 times.
Air curtain heaters will then operate and after 30 seconds the LEDs on the remote control will stop
flashing and the status LED on the Ecopower PCB in the air curtain will flash green.
18.2 Fuses
In the event of an electrical fault internal electrical fuses may operate.
There are two internal fuses located on the Ecopower PCB inside the air curtain:

Fuse 6.3A (T) supplies the fan motors within the air curtain

Fuse 100mA (F) controls the operation of the motherboard
18.3 Ecopower PCB status indication
There is a status LED on the Ecopower PCB inside the air curtain (See LED shown on Wiring
Diagrams in the Appendix).
This indicates the status of the Ecopower Control system as follows:
1. LED flashing green – operation normal
2. LED flashing red – low supply voltage, remote control not plugged in or RJ cable fault
3. LED permanently red – overheat safety cut-out(s) open circuit from an overheat situation
(see Section 18, Fault Conditions for how to reset)
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