PAGE 15 of 41 HG-1-1401A GAS-FIRED HEATER
© SAMUEL JACKSON, INCORPORATED 2005 ALL RIGHTS RESERVED
ERROR 164
AIR TEMPERATURE THERMOCOUPLE BURNOUT:
This ERROR normally means
that the thermocouple mounted in the duct sensing air temperature has burned out or the
thermocouple sensor wire connections are loose. If the air temperature remains at 000 F a
few seconds after the heater lights, this ERROR occurs. The thermocouple wires are
polarity sensitive so reversing the wire hookups could also cause this condition. For type
‘J’ thermocouples, the white wire is positive, red is negative. Reversing the wires will
cause the PLC to think the temperature is falling when it is actually rising. If the
temperature is dropping as the gas valve is opening, this ERROR will occur.
ERROR 163
HIGH TEMPERATURE AT BURNER HEAD:
This ERROR will shut the burner down
due to a high temperature condition sensed in the burner duct with the factory installed
burner high temperature thermocouple. Operating the heater at very low air flows (under
750 CFM) or with the shutters before the burner head too far open can result in a high
temperature condition.
*ERROR 166
SSOV1 FAILED POC SWITCH NOT SATISFIED:
The PLC was not able to verify that
Saftey Shut-Off Valve 1 (upstream SSOV valve) is opening and closing in a timely
manner. If this problem persists, try the following: Check that SSOV opens and closes.
Check for gas leaks. Check operation of SSOV's proof of closure switch (POC). Replace
SSOV valve actuator and/or its proof of closure switch.
If the operator is aware of the safety issues involved in bypassing the function of the
Proof of Closure switch (POC), a temporary software bypass is available by pressing the
BYPASS button on the error screen.
ERROR 171
HIGH TEMPERATURE DOWNSTREAM:
This ERROR will shut the burner down if the
heated air temperature is more than 50 degrees above the air temperature setpoint.
ERROR 172
FLAME CONTINUES TOO LONG AFTER SHUTDOWN:
This ERROR means that
flame is detected for more than 12 seconds following closure of all gas valves. This
indicates a probable gas leak in the system. Run the TESTS program and perform the
Gas Low Pressure test to determine the severity of the leak. Consult the factory for
service recommendations. In rare cases, very low quality LPG fuel can cause this.
ERROR 174
CONSTANT AIR TEMPERATURE > 5 MINUTES:
The heated air temperature is
constantly monitored. Very small fluctuations in temperature are expected and indicate
that the thermocouple wiring and thermocouple input card on the PLC are in working
order. Check for disconnected thermocouple, thermocouple wiring problem and
connections to the thermocouple input card on the PLC.