Patterson-Kelley MACH-05 manual Manual Reset Service Codes, Code Lockout

MACH® Series Gas-Fired Boiler Maintenance

5.5.1 Manual Reset Service Codes

Code	Lockout
E 00	False flame.
E 02	Flame failure.
E 03	Gas Valve error.
E 04	General lockout.
E 05	Internal control failure.
E 06	Internal control failure.
E 07	Internal control failure.
E 08	Air pressure switch open.
E 11	Internal control failure.
E 12	External limit open.
E 13	Internal control failure.
E 14	Internal control failure.
E 15	Internal control failure.
E 16	Internal control failure.
E 17	Internal control failure.
E 18	Outlet high limit temp.
E 19	Return high limit temp.
E 25	Outlet temp rapid change.
E 28	No blower feedback.
E 29	Blower feedback will not zero.
E 31	Outlet sensor shorted.
E 32	Return sensor shorted.
E 33	DHW sensor shorted.
E 35	Flue sensor shorted.
E 36	Outlet sensor open.
E 37	Return sensor open.
E 38	DHW sensor open.
E 40	Flue sensor open.
E 44	Internal control failure.
E 52	High flue temp.
E 60	Internal control failure.

Description

A flame signal is present when it shouldn’t be.

The burner did not light on startup, or loss of flame during run. Check all gas valves electrical connections.

The power was lost after a lockout. The control loses the description of the lockout on power loss.

Call for service. Call for service. Call for service.

The air pressure switch failed to close to indicate sufficient air flow to start the boiler. Call for service.

One of the external limits has opened. (High/Low Gas Pressure, High Temp, Low water). Call for service.

Call for service. Call for service. Call for service. Call for service.

The outlet water temperature has exceeded the internal high limit temperature setting. The return water temperature has exceeded the internal high limit temperature setting. The outlet water temperature is increasing too fast. Indicating low flow condition.

The blower should be running but it is not, or the feedback signal has been interrupted. The blower will not go to zero speed even though it should be off.

The outlet temperature sensor is short circuited. The return temperature sensor is short circuited. The DHW temperature sensor is short circuited.

The flue gas temperature sensor is short circuited.

The outlet temperature sensor is indicating an open circuit. The return temperature sensor is indicating an open circuit. The DHW sensor is indicating an open circuit.

The flue gas temperature sensor is indicating an open circuit. Call for service.

The flue temperature has exceeded the maximum allowable setting. Call for service.

Note: When an Internal Control Failure occurs, as identified by E-Codes listed above, the failure is internal to the MCBA and replacement of the MCBA is required. A qualified service technician must be called to replace the MCBA device.

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