Lochinvar CF-CH(E)-i&s-08, 999 - 750, 399 Hot Surface Ignition System, Error and Warning Messages

Installation and Service Manual

3.Do not locate temperature sensor wiring near electric motors.

4.Do not locate temperature sensor wiring near welding equipment.

5.Make sure good mechanical connections are made to the sensor, any interconnecting wiring and the controller.

6.Do not mount sensor with leadwire end pointing up in an area where condensation can occur.

7.Use shielded wiring to connect the sensor to the control when the possibility of an electrically noisy environment exist. Shielded cable is recommended on all cable runs of more than 25 feet in length.

Note: Ground the cable shield at the connection to the boiler/electronic temperature control only. Do not ground the shielded cable at the sensor end.

To maintain temperature accuracy, sensor wires should be at least 18 AWG. See Table T below.

TABLE-T

Remote Wire Connection

Wire	Maximum
Gauge	Allowable Length
12 GA	100 ft
14 GA	75 ft
16 GA	50 ft
18 GA	30 ft

Error and Warning Messages

The temperature control will enumerate errors on the display when it senses any. If a sensor is shorted, the display will show “SHr” and an identification of which sensor is effected. If a sensor has an open circuit, the display will show “OPn” and an identification of the sensor effected. If freeze protection is active, the display will show “E02”. If the control read an error at power-up, the display will show “E01” (simply turn the power OFF and then ON again to reset the control). If ΔT MAX is utilized and the outlet temperature exceeds this value,

the display will show “Err”.

HOT SURFACE IGNITION SYSTEM

Hot Surface Igniter and Ignition Control Module

The 399,999 - 750,000 Btu/hr models have one ignition module and one hot surface igniter. The 990,000 - 2,070,000 Btu/hr models have two ignition modules and two hot surface igniters.

FIG. 51 Hot Surface Igniter

FIG. 52 Hot Surface Ignition Control Module

Hot Surface Ignition Control Module

Ignition Module Lockout Functions

The ignition module(s) may lockout in either a hard-lockout condition, requiring pushing of the reset button to recycle the control, or a soft-lockout condition which may recycle after an approximate five-minute waiting period. This soft-lockout condition is intended to allow self-correcting faults to correct themselves and permit normal operation. A typical hard-lockout fault is a flame failure condition. An ignition module that is in a hard-lockout condition may only be reset by pushing the reset button for the ignition control. The reset buttons are located on the front of the control panel. Upon a flame failure, the reset button is only active after the control module has completed its post-purge cycle. Turning main power “OFF” and then “ON” or cycling the thermostat will not reset a hard-lockout condition. Wait five seconds after turning on main power before pushing the reset button when the ignition module is in a hard lockout. The ignition module will go into a soft lockout if conditions of low air, low voltage or low hot surface igniter current. A soft-lockout condition will operate the combustion air fans for the post purge cycle and then the ignition module will pause for approximately five minutes. At the end of this timed pause, the ignition module will attempt a new trial for ignition sequence. If the soft-lockout fault condition has subsided or has been corrected at the end of the timed pause, main burner ignition should be achieved with the resumption of the normal trial for ignition sequence. If the control sensed fault is not corrected, the ignition module will continue in the soft-lockout condition. If the electronic thermostat opens during the soft-lockout period, the ignition module will exit soft lockout and wait for a new call for heat from the thermostat. A soft-lockout condition may also be reset by manually cycling the electronic thermostat or turning the main power switch “OFF” and then “ON” after the control sensed fault has been corrected.

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