EGG STATION (ES-600 & ES-1200)
TROUBLESHOOTING (continued)
Control Board LEDs
The Control Board has three onboard LEDs (Figure
5)to determine the status of the unit and to assist in troubleshooting.
Green (Diagnostic): The LED should be off in normal operation however, if any of the 5 potential faults are detected by the Control Board, this LED will repeatedly
Green
Yellow
Red
STATUS
GRN | CR4 |
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YELL | CR5 |
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RED | CR6 |
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HEAT
BUZZ
Solid State
Relay
LED
50 AMP
1/L12/T1
Crouzet
TUV
| GN |
| 84137220 |
4/A2- | +3/A1 |
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blink either 1 through 5 times with a 2 second pause in between (refer to the Green LED Blink Codes section below).
Yellow (Audio): When lit, This LED indicates that the Control Board is supplying approximately
Red (Heat): When lit, this LED indicates that the Control Board is calling for heat by supplying VDC to terminals 3(+) and
Green LED Blink Codes
Figure 5. Control Board | Figure 6. Solid State |
LEDs | Relay |
NOTE: During heat mode, this Red LED is very dim, so it may be difficult to verify if the Control Board is, or is not, calling for heat. It is recommended that you observe the small round green LED on the Solid State Relay (Figure 6)for mode and diagnostic purposes. When the green LED on the Solid State Relay is on, it means that the Control Board is call- ing for heat. When off, it means that the Control Board is NOT calling for heat. Typically, the VDC at the Solid State Relay will be less than 1.0 VDC when measured, but may vary because of different quality VOMs. Therefore, it is recommended that you DO NOT attempt to measure the VDC at the Solid State Relay for diagnostic purposes.
Control Board | Unit State | Condition |
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LED Activity |
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The Green LED | The EEPROM memory on the Control | In this state, the unit turns off the control signal to the solid |
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blinks on and off | Board is corrupted. | state relay and disables all front buttons and lights. The unit |
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1 time, pauses for |
| will not heat up. This continues until the defaults are reloaded |
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2 seconds, and |
| into memory. To reload the defaults, turn the unit off, press and |
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repeats |
| hold the Time 2 button, turn the unit back on, and release the |
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The Green LED | The ambient temperature within the | In this state, the unit turns off the control signal to the solid |
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blinks on and off | control compartment has exceeded 155º | state relay and disables all front buttons and lights. The unit |
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2 times, pauses | F (68º C). Verify that there is proper air | will not heat up. This continues until the ambient temperature |
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for 2 seconds, and | ventilation all around the unit and that it | within the electrical compartment drops below 140º F (60º C) |
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repeats. | is not near a significant heat source. | and the unit is turned off and back on. |
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The Green LED | Open or disconnected Thermocouple. | In this state, the unit turns off the control signal to the Solid |
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blinks on and off |
| State Relay and disables all front buttons and lights. The unit |
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3 times, pauses |
| will not heat up. This continues until the Thermocouple is |
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for 2 seconds, and |
| reconnected or replaced, and the unit is turned off and back |
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repeats. |
| on. |
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The Green LED | The supply voltage to the unit is below | In this state, the unit turns off the control signal to the Solid |
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blinks on and off | 160 VAC or above 265 VAC. | State Relay and disables all front buttons and front lights. The |
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4 times, pauses |
| unit will not heat up. This continues until the supply voltage is |
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for 2 seconds, and |
| within the proper limits and the unit is turned off and back on. |
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repeats. |
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The Green LED | The 50/60 Hz signal has been lost due | In this state, the unit turns off the control signal to the Solid |
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blinks on and off | to a loose, disconnected, or an open | State Relay and disables all front buttons and lights. The unit |
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4 times, pauses | wire harness/wiring on the AC Isolator | will not heat up. This continues until the 50/60 Hz signal is |
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for 2 seconds, and | Board, or from the AC Isolator Board to | reapplied and the unit is turned off and back on. |
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repeats. | the Control Board. |
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| 12 | P/N 1010871 Rev. D 08/05 |
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