Alliance Laundry Systems CA120L - Ignition Control Operation and Troubleshooting for Models Starting; Internal Control Failure; Troubleshooting

Operating Instructions
Part No. 70458101ENR7
©
Copyright, Alliance Laundry Systems LLC - DO NOT COPY or TRANSMIT 77
Ignition Control Operation and
Troubleshooting for Models Starting
3/11/13
WARNING
70458601 and 70458701 controls cannot be serviced
by the user. If any control failures are detected,
the controls must be replaced by qualified service
personnel. Risk of explosion or fire can result if
the control module has been opened or with any
attempts to repair it and the warranty is void.
W818
Before troubleshooting the system, check the following items:
- Verify all mechanical and electrical connections are secure and
tight.
- Verify all system wiring is correct.
- Verify there is a proper system ground. The igniter, flame
sensor and igniter module must share a common ground with the
burner. Nuisance shutdowns are often caused by a poor or erratic
ground.
- Verify that the system is powered and that the control is calling
for heat.
- If the control proceeds to an error code on the red diagnostic
LED, troubleshoot per the Fault conditions table below:
Fault Conditions
LED Indication Fault Mode
Off Normal Operation
1 Flash At Power Up
2 Flashes Flame Without Call For
Heat
3 Flashes Ignition Lockout
4 Flashes (70458701 only) Manual Reset Error
Steady On Internal Control Failure
NOTE: The LED will flash on for 1/4 second, then off
for 1/4 second during a fault condition. The pause
between fault codes is 3 seconds.
Internal Control Failure
If the control detects an error in its software or hardware, all
outputs are turned off and the red LED displays a steady ON
condition. If this condition persists after an attempt to restart,
then the control must be replaced.
Troubleshooting
Troubleshooting Guide
Symptom Probable Cause
Control in Lockout Mode (70458701 Control Only) Manual reset of the control is needed. Reset by pushing red
lockout button or use front end control.
Control does not start, green LED is off 1. 24 VAC present between 24V and ground on 70458701
only. If not, see machine schematic.
2. 24 VAC present between TH and ground. If not, see machine
schematic.
Thermostat on, no spark or valve 1. Cable connects to control and electrode. Voltage present at
gas valve.
2. Bad control. Check red LED for steady on or flashing codes.