Troubleshooting Guide - L.B. White Foreman CI230 Manuel Du Propriétaire Et Instructions

22
Foreman Ductable Oil Indirect-Fired Heater
CI500/CI750 Gauge Port
Gauge Port

Troubleshooting Guide

READ THIS ENTIRE SECTION
BEFORE BEGINNING TO
TROUBLESHOOT PROBLEMS.
WARNING
■ This heater can start at any time.
■ Troubleshooting this system may require
operating the unit with line voltage present
and fuel .
■ Use extreme caution when working on the
heater.
■ Failure to follow this warning may result in
property damage, personal injury or death.
The following troubleshooting guide provides
procedures for isolating equipment problems.
This guide is intended for use by a QUALI-
FIED HEATER SERVICE PERSON. DO NOT
ATTEMPTTO SERVICE THESE HEATERS UN-
LESS YOU HAVE BEEN PROPERLYTRAINED.
TEST EQUIPMENT REQUIRED:
• Digital Multimeter - for measuring AC voltage
and resistance
• High Pressure Gauge - for checking pump pres-
sure against dataplate rating.
Before Starting:
• Visually inspect equipment for apparent damage.
• Check all wiring for loose connections and
worn insulation.
Components should be replaced only after each
step has been completed and replacement is
suggested. Refer to the Servicing sections as
Owner's Manual • Foreman
necessary to obtain information on disassembly and re-
placement procedures of the component once the problem
is identified. Refer to the sys-tem operation sequence in
this section to gain an understanding as to how the equip-
ment operates during a call for heat. Understanding the
sequence of operation of the ignition module and related
components is essential as it will relate directly to problem
Pressure
solving provided by the charts.
adjustment
screw
OPERATION SEQUENCE:
• Line voltage connected to heater power receptacle.
- Volt meter display line voltage
Pump
• Line voltage is sent to:
bleed valve
- Selector switch terminal 2
- Main motor relay terminal 2
- Heater control terminal "L1"
• Selector switch set to heat mode.
- Line voltage sent to thermostat outlet.
• Thermostat calls for heat or Thermostat switch set to
manual.
- Thermostat selector switch sends voltage to terminal
"W" of heater control.
- Thermostat LED activated indicating a call for heat.
- Line voltage is sent from heater controller "PSO" to
manual reset high limit.
- Line voltage returned to "PSI" on heater control.
- Line voltage is sent to burner control.
- Burner motor starts.
- High limit LED Flashes
• 45 seconds after Burner control receives power.
- Ignition occurs
• 30 second after ignition occurred, line voltage is sent
from "IND" to main motor relay terminal 0.
- Relay closes, Main motor is energized.
- Main motor LED comes on.
- Limit/Purge LED stop flashing
• Thermostat opens once heat demand is satisfied.
- Thermostat LED off
- Heater control shuts off burner.
- Main motor continue to receive line voltage
(post-purge) for 180 seconds.
- Limit/Purge LED flashes
• After 180 seconds, heater control de-energized
blower motor
- Limit/Purge LED off
- Main motor LED off