Installation / Operation Instruction Manual

55
DIAGNOSTIC ERROR CODES AND TROUBLESHOOTING PROCEDURES FOR EF MODELS WITH HONEYWELL
INTEGRATED DIRECT SPARK IGNITON CONTROL SYSTEM
Error
Code
Definition of Code
Cause of Problem and Actions Taken to Correct
No code –
blank
display
Check power supply to the water heater. Make sure water heater is plugged in
and the breaker is on. Check if there is 120 volts power supply to the LINE
connections on the control board. If 120 volts is present, check for 24 volts
output to SECONDARY terminals on the Control Board. Check for loose wires,
defective transformer. Check wire harness connections from display to the
control board.
4
Low Flame Sense
Current
Determine flame sense current in the Service Mode with the water heater
operating. If less than 4.0 microamps, check burner flame sense rod and wire.
Clean flame sense rod with emery cloth. If problem is not solved, check for
debris clogging burner or replace flame sense rod.
6
Flame Sensed Out of
Normal Sequence
(Before Opening Gas
Valve or After
Closing Gas Valve)
Check to make sure gas valve has closed. No voltage should be present at the
gas valve before or after ignition cycle. Make sure wire positions on the wire
harness are correct. If gas valve is stuck open, replace.
23
Flame Detected
Before Ignition
Check to make sure gas valve has closed. No voltage should be present at the
gas valve before the ignition cycle. Make sure wire positions on the wire
harness are correct. If gas valve is stuck open, replace.
24
Flame Detected After
Heating Cycle
Completes
Check to make sure gas valve has closed. No voltage should be present at the
gas valve before the ignition cycle. Make sure wire positions on the wire
harness are correct. If gas valve is stuck open, replace.
32
Sensor Reading
Faulty
Resistance of sensor out of operating range. Check continuity of wire harness
to sensor, and if O.K., replace sensor.
57
Flame Rod Shorted
to Ground
Pilot flame sensor rod is shorted to ground. Check to see if flame sensor wire
has bare spots touching metal parts of if flame sensor rod is touching the burner
or other metal parts. Replace if flame sense wire is damaged or flame rod is
bent.
58
AC Line Frequency
Error – Signal Too
Noisy or Frequency
Incorrect
Check line voltage frequency to the water heater. Determine if there are wide
fluctuations. Call an electrician if the problem persists. The water heater
should be on a separate line.
59
Line Voltage Too
Low or High
Check line voltage to the water heater. Determine cause of low or high voltage.
Call an electrician or your utility. The water heater should be on a separate line.
61
DC Output Voltage
Unstable
Check line voltage to the water heater for erratic readings. Also check wiring to
make sure there are no shorts. If power supply and wiring are O.K., replace
control board.
62
Maximum Number of
Retries Detected
Burner is either not lighting or not staying lit during ignition cycle. Check inlet
gas pressure for minimum pressure on rating label. Can you hear sparking to
the burner? Check high voltage cable connections. Check inlet gas pressure
to the gas valve making sure the pressure is within the limits specified on the
rating label. Check gas valve wire harness for broken wires or shorts. Check
outlet gas pressure. If 24 volts is present to the terminals at the gas valve,
replace gas valve. Check for voltage output to the blue gas valve wires on the
control board pins. If during the ignition trial period, there is no voltage present
at the control board pin terminals for the blue wires leading to the gas valve,
then replace the control board. Replace spark rod if insulator is damaged or
rod is loose. Check to make sure combustion blower is operating when
thermostat calls for heat. If blower is not running check for 120 volts to blower
harness and then at blower pin connections. Replace control, wire harness, or
blower if defective. Check to make sure vent terminals are clear of debris or
snow and ice. Make sure the condensate drain flows freely.