ERROR CODES
70 SERVICE MANUAL
Error 52/62
Gas valve failure. The gas valve does not open after 5 startup attempts
(timeout 20 sec.)
Steps Check list Solution
1 Go to the test menu. Perform the startup
sequence.
2 Check that the controller receives
feedback from the pressure switch and the
gas valve.
If there is no feedback,
perform the startup
sequence again.
3 Check that the relays are working properly. Change the relays.
4 Check the Dungs control box.
(See Appendix I:
Identifying Gas-air Units and Coil on page
89)
Error 53/63
Fan RPM. The pressure switch is active at start (timeout 20 sec.)
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