Temperature Control Diagnostics; Co2 Control Diagnostics; General Control Diagnostics - NuAire NU-5800 Operation And Maintenance Manual

Temperature Control Diagnostics

1. Safety Relay
2. Chamber Temperature Sensor
3. Safety Temperature Sensor
4. Chamber Heater Triac Control (0%, 50%, and 100%)
5. Door Heater
6. Perimeter Heater

CO2 Control Diagnostics

1. CO2 Sensor
2. CO
3. CO2 Sensor Bay Heater Triac Condition
4. CO2 Sensor Bay Temperature Sensor
5. Air inject Solenoid
6. Blocking Solenoid

General Control Diagnostics

1. Power Supply Regulated +12 VDC
2. Power Supply Regulated +5 VDC
3. Chamber Air Inject Solenoid
4. Remote Alarm Relay
5. Air Pump Triac
OM0211
Rev 3 March 2013
This function shows the current state of the safety relay. LCD display will show "On" or "Off"
corresponding to the relay condition. On for closed or set or yes.
This function shows on LCD the current values, calibrated (displayed) and not calibrated of the
temperature sensor controlling the chamber temperature.
This function shows on LCD the current values, calibrated and not calibrated of the Safety
temperature sensor located in the chamber.
This function allows the jacket heater to be turned on at different percentages 0, 50,100)
This function shows on LCD the current state of the door heater. This function also allows the door
heater to be turned on at different percentages (0, 50, and 100 percent). The LCD display will show
phase firing percentage chosen default is 0%.
This function shows the current state of the perimeter heater. This function also allows the
perimeter heater to be turned on at different percentages (0, 50, and 100 percent). The LCD display
will indicate percentage of phase firing chosen default is 0%.
This function shows the current CO2 sensor reading.
The value comes in as a ppm number which can then be easily displayed as a percentage number
Inject Valve
2
This function shows on LCD the current state of the CO2 inject valve. LCD will show "ON" or "OFF"
corresponding to the valve condition. On for open or set or yes.
This function shows on LCD the current state of the CO
percent corresponding to the relay position. The triac can be toggled to each percent of phase firing
manually.
This sensor shows the sensor bay temperature in degrees C
This function shows on LCD the current state of the Air Inject Solenoid.
LCD will show "ON" or "OFF" corresponding to the solenoid position.
Default is off-solenoid activates when the button is touched
This function shows on LCD the current state of the Blocking Solenoid.
Default is off – solenoid activates when the button is touched.
This function will display on the LCD screen the current value (+12.xx) of the regulated +12 VDC
power supply.
This function will display on LCD screen the current value (+5.00) of the regulated +5 VDC power
supply.
This function shows on LCD the current state of the Air Inject Solenoid. LCD will show "ON" or "OFF"
corresponding to the solenoid position. Default is off-solenoid activates when the button is touched
This function shows on LCD the current state of the remote alarm relay. The LCD display will show
"ON" or "OFF" corresponding to the relay condition and its Normally Open (NO0 pair of contacts
This function shows on LCD the current state of the Air Pump Triac. LCD will show "ON" or "OFF"
corresponding to the relay position. The triac can be manually turned On and Off.
Heater triac. LCD will show 0, 50, and 100
2
Page 29 of 48