White Rodgers 50M58-707 User manual

white-rodgers.com
Failure to comply with the following warnings could
result in personal injury or property damage.
FIRE HAZARD
• Do not exceed the specified voltage.
• Protect the control from direct contact with water
(dripping, spraying, rain, etc.)
• If the control has been in direct contact with water,
replace the control.
• Label all wired before disconnection when servicing
controls. Wiring error can cause improper and
dangerous operation.
• Route and secure wiring away from flame.
SHOCK HAZARD
• Disconnect electric power before servicing.
• Ensure proper earth grounding of appliance.
• Ensure proper connection of line neutral and line
hot wires.
EXPLOSION HAZARD
• Shut off main gas to appliance until installation is
complete.
Installation should be done by a qualified heating and air
conditioning contractor or licensed electrician.
Do not exceed the specification ratings.
All wiring must conform to local and national electrical codes
and ordinances.
This control is a precision instrument, and should be handled
carefully. Rough handling or distorting components could cause
the control to malfunction.
Following installation or replacement, follow manufacturer's
recommended installation/service instructions to ensure proper
operation.
IMPORTANT NOTE: ELECTROSTATIC DISCHARGE
(ESD) PRECAUTIONS
Before removing the new control board from the static wrap,
it is very important to discharge any static electricity. This
can be accomplished in two methods. Servicer can wear
a ground strap or by touching the metal chassis before
replacing the board.
50M58-707
2-Stage, ECMx, IFC, Goodman
INSTALLATION INSTRUCTIONS
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.
PRECAUTIONS
CONTENTS
Description ............................................................. 1
Precautions ........................................................... 1
Installation .............................................................. 2
Specifications ......................................................... 3
Wiring ..................................................................... 4
Operation................................................................ 6
System Lockout and Diagnostic Features .............. 7
Troubleshooting ...................................................... 8
DESCRIPTION
Do not short out terminals on gas valve or primary
control. Short or incorrect wiring may damage the
thermostat.
CAUTION
!
WARNING
!
The 50M58-707 is a replacement control for two-stage automatic
gas ignition controls employing a microprocessor to continually
monitor, analyze, and control the proper operation of the gas
burner and inducer. The 50M58-707 controls a multiple tapped
induction circulation blower.
Signals interpreted during continual surveillance of the two-
stage thermostat and flame sensing element initiate automatic
ignition of the burner, sensing of the flame, and system shutoff
during normal operation.
PART NO. 37-7897001
2322
Kit Components:
Q t y. Part Number Description
1 50M58-707 50M58-707 Control Board
1 0115-0324 Wiring Harness
1 37-7899 Wiring Diagram Label
1 37-7897 Kit Installation Instructions
The control incorporates system fault analysis for quick gas
flow shutoff, coupled with automatic ignition retry upon sensing
a fault correction.

2
INSTALLATION
ATTENTION INSTALLING PERSONNEL
As a professional installer you have an obligation to know
the product better than the customer. This includes all safety
precautions and related items.
Prior to actual installation, thoroughly familiarize yourself with this
Instruction Manual. Pay special attention to all safety warnings.
Often during installation or repair it is possible to place yourself
in a position which is more hazardous than when the unit is in
operation.
Remember, it is your responsibility to install the product safely
and to know it well enough to be able to instruct a customer in
its safe use.
Safety is a matter of common sense...a matter of thinking before
acting.Most dealer have a list of specific good safety practices...
follow them.
The precautions listed in this Installation Manual are intended
as supplemental to existing practices. However, if there is a
direct conflict between existing practices and the content of this
manual, the precautions listed here take precedence.
REPLACING PCBBF139, PCBBF139S,
PCBBF139SK OR 50M58-289-03
CONTROL BOARD
1. Disconnect electrical power supply to the furnace and verify
safe condition with an electrical tester.
2. Note the position of all connectors and wires.
3. Remove existing board from the mounting plate and install
the replacement control board.
4. Transfer wires and connectors to replacement control board.
5. Check / Set DIP switches to desired positions.
REPLACING PCBBF133 (S), PCBBF137 (S),
50M58-289-01, OR 50M58-289-02
CONTROL BOARD
1. Disconnect electrical power supply to the furnace and verify
safe condition with an electrical tester.
2. Note the position of all connectors and wires
3. Remove existing board from the mounting plate and install
the replacement control board.
4. Remove the line voltage harness connector from the motor;
this connector contains red, black, green, and while wires.
5. Insert the line voltage connector of the new harness into
the empty motor socket.This connector contains red, black,
green and white wires.
6. Remove the motor speed harness connector from the motor.
This connector contains black, orange, red and blue wires.
7. Insert the motor speed connector of the new harness into
the empty motor socket. This connector contains black,
orange, red and blue wires.
8. Connect the single white wire in the new harness to any of
the Neutral terminals located in the top right section of the
replacement control board.
9. Connect the single black wire in the new harness to the
CIRC-H terminal located in the top center section of the
replacement control board.
10. Connect ground wire using to motor housing ground screw.
11. Connect the five-wire motor speed harness to the mating
connector located in the top left section of the control board.
This section of harness contains red (x2), black, orange,
and blue wires.
12. Refer to the DIP switch identification information below for
the 50M58-707 control and set DIP switches to desired
positions.
WARNING
!
HIGH VOLTAGE! Disconnect ALL power before
servicing,multiple power source may be present.
Failure to do so may cause property damage,
personal injury or death.
WARNING
!
HIGH VOLTAGE! Disconnect ALL power before
servicing,multiple power source may be present.
Failure to do so may cause property damage,
personal injury or death.
Cooling
CFM
Switches
Heating
CFM
Switches
Continuous
Fan CFM
Switches
Thermostat
Selection
Switches
Heating Fan
Off Delay
S1
S2
S3

3
SPECIFICATIONS
ELECTRICAL RATINGS [@ 77 OF (25 OC)]:
Input Voltage: 120 VAC, 60 Hz (Class II transformer required)
Max. Input Current @ 24 VAC: 800mA + MV
Relay Load Ratings:
1st Stage Gas Valve Relay: 1.5 amps @ 24 VAC, 60 Hz
2nd Stage Gas Valve Relay: 0.5 amps @ 24 VAC, 60 Hz
Ignitor: 2.0 amps @ 132 VAC, 60 Hz
Inducer Relays: 2.2 FLA - 3.5 LRA @ 120 VAC
Humidifier Load: 1.0 A max @ 120 VAC
Electronic Air Cleaner Load: 1.0 A max @ 120 VAC
Circulator Output : 12 mA RMS @ 30 VAC
Flame Current Requirements:
Minimum current to ensure flame detection: 0.3 µa DC*
OPERATING TEMPERATURE RANGE:
-40° to 175°F (-40° to 80°C)
HUMIDITY RANGE:
5% to 93% relative humidity (non-condensing)
Timing Specs: (@ 60 Hz**)
maximum
Flame Failure Response Time: 2.0 sec
Gases Approved: Natural, Manufactured, Mixed, Liquid Pe-
troleum, and LP Gas Air Mixtures are all approved for use.
50M58-707 TIMING TABLE
(All times are in seconds, unless noted otherwise)
Event Definition Time
Pre-purge Time The period of time intended to allow for the dissipation of any unburned
gas or residual products of combustion at the beginning of a furnace
operating cycle prior to initiating ignition
15
Igniter Warm-up Time The length of time allowed for the igniter to heat up prior to the initiation
of gas flow.
17
Trial for Ignition Period (TFI) The period of time between initiation of gas flow and the action to
shut off the gas flow in the event of failure to establish proof of the
supervised ignition source or the supervised main burner flame.
4
Ignition Activation Period (IAP) The period of time between energizing the main gas valve and
deactivation of the ignition means prior to the end of TFI
3
Retries The additional attempts within the same thermostat cycle for ignition
when the supervised main burner flame is not proven within the first
trial for ignition period.
2 times
Valve Sequence period Valve sequence period equals 5 seconds trial for ignition period x
(1 initial try + 2 retries) + 12 seconds.
15
Inter-purge The period of time intended to allow for the dissipation of any unburned
gas or residual products of combustion between the failed trial for
ignition and the retry period.
30
Post-purge Time The period of time intended to allow for the dissipation of any unburned
gas or residual products of combustion at the end of a furnace burner
operating cycle. Post-purge begins at the loss of flame sense.
15
Lock-Out Time ANSI standard rated module timing. 300
Heat Delay-To-Fan-On The period of time between proof of the supervised main burner flame
and the activation of the blower motor at Heat speed.
30
Heat Delay-To-Fan-Off* The period of time between the loss of a call for heat and the
deactivation of the blower motor at Heat speed.
90/120/150/180
Cool Delay-To-Fan-On The period of time after a thermostat demand for cool before energizing
the circulator blower motor at Cool speed.
5
Cool Delay-To-Fan-Off The period of time between the loss of a call for cool and the
deactivation of the blower motor at Cool speed.
45
Automatic Reset Time After one (1) hour of internal or external lockout, the control will
automatically reset itself and go into an auto restart purge for 60
seconds.
60 minutes
*These times will vary depending on option switch position.

4
WIRING
GN
GND
COLORCODES:
GNGREEN
RDRED
GYGRAY
PUPURPLE
PKPINK
BKBLACK
BLBLUE
WHWHITE
BRBROWN
YLYELLOW
ORORANGE
GND
BK
RD
GN
GN
24 VAC
115 VAC
GND
GRD
BK
YLOYW1W2RGCTWIN
N.E.C.CLASS2WIRE
0140F02347-A
BR
PK
GY
OR
GN
BL
YL
S1
BK
HUM
X-FMR
L1
CIRC-H
EAC-H
5
21 4
3
24V3A
FUSE
NEUTRAL
DIAGNOSTIC
LED'S
5 CIRCUIT CONNECTOR
10
6
3
4
5
2
7
11
1
12
8
9
FRONTCOVER
PRESSURE
SWITCH
NO
C
FUSE3A
MICRO
TO
PS2(2)
TR(9)
G
HI
C
TH(5)
24V THERMOSTAT CONNECTIONS N.E.C. CLASS 2 WIRE
VALVE
GAS
W2
TRANSFORMER
HLI(6)
Y2
Y1
HLO(11)
GND(4)
O
MVL(7)
NO
W1
C
R
CONTROLS
AUTORESETAUXILIARYLIMIT
LIMITCONTROLS
MANUALRESETROLLOUT
PRESS.SWTICH
HIGHFIRE
C
SWITCH
LOWFIREPRESS
MVH(1)
DEHUM
GND
PS1(12)
LIMITCONTROL
AUTORESETPRIMARY
24VAC
NO
PM
MVC(8)
INTEGRATEDCONTROLMODULE
C
BLWR
AIR
INDOOR
CIRCULATOR
R
TO
MICRO
TO
TO
+VDC
EAC
HUMIDIFIER
ID
NEUTRAL
WIRINGTOUNIT
L
INTEGRATED CONTROL MODULE
HOTSURFACE
GND
BLWR
NEUTRAL
WARNING:
GROUNDED.
OVERCURRENTPROTECTIONDEVICE
MUSTBEPROPERLY
SWITCH
NEUTRAL
ELECTRONIC
AIR
IGN
INDHI
DISCONNECT
FS
POLARIZEDAND
NEUTRAL
LINE
NEUTRAL
JUNCTIONBOX
BLWR
INDLO
N
INDOOR
AIRCLEANER
HUM
DOOR
NEUTRAL
INTEGRATED CONTROL MODULE
TO115VAC/1Ø/60HZPOWERSUPPLYWITH
115VAC
HUM-OUT
IGNITER
CIRCULATOR
BEFORESERVICING.
FLAMESENSOR
DISCONNECTPOWER
LINE
GND
T1
T2
OR
BR
BK
WH
WH
WH WH
PU
GY
YL
OR BR
PK
RD
WH
BK
PU
GY
BR
OR
RD
OR
BL
RD
WH
WH
LINE
NO
LIMITCONTROL
AUXILIARY
AUTORESET
PK
WARNING:DISCONNECT
TRANSFORMER
40 VA
PU
GY
N
NO
3
1
SWITCH
PRESSURE
LOWFIRE
SENSOR
FLAME
PRESSURESWITCH
FRONTCOVER
C
TO UNIT MUST BE
BL
RD
AND GROUNDED.
1
JUNCTION BOX
WH
SWITCH (PRESS.)
FIELD SPLICE
FIELD GND
3
GN
BL
BR
WH
NO
LIMITCONTROL
AUTORESETPRIMARY
WH
1
OR
30kBTUAND40kBTU)
CONTROLS(SINGLECONTROLON
MANUALRESETROLLOUTLIMIT
WH
L
PU
GY
BK
SWITCHASSEMBLY
IDBLOWERTWO-STAGEPRESSURE
OR
WH
SERVICING. WIRING
EQUIPMENT GND
INTERNAL TO
SWITCH
PRESSURE
HIGHFIRE
PROT. DEVICE
INTEGRATED CONTROL
PK
PU
PLUG CONNECTION
2
4
BK
C
DOOROPEN)
(OPENWHEN
DOORSWITCH
COMPARTMENT
BLOWER
SWITCH (TEMP.)
GND
1
BLOWER
CIRCULATOR
JUNCTION
OR
40VA
Ø/60HZ
DISCONNECT
(WHITERODGERS)
GASVALVE
TWOSTAGE
OVERCURRENT
CONNECTOR
2CIRCUIT
LOW VOLTAGE (24V)
YL
GND
WH
CHASSIS GROUND
2
3
IGNITER
SURFACE
HOT
2
YL
PU
C
2
C
BLOWER
DRAFT
INDUCED
BK
PM
BK
BLOWERCOMPARTMENT
115VAC/1
OVERCURRENT
BK
HARNESS
ECM MTR
HI
TERMINAL
OR
POWER BEFORE
IGNITER
RD
BK
TO
RD
POWERSUPPLYWITH
BURNERCOMPARTMENT
PROTECTIONDEVICE
PROPERLY POLARIZED
RDBK
OR
BL
LOW VOLTAGE FIELD
HI VOLTAGE (115V)
HI VOLTAGE FIELD
RAPID=TWINNINGERROR
STEADYON=INTERNALGVERROR,MICROANDFREQUENCYCHECK
1FLASH=FLAMESENSEDWHENNOFLAMESHOULDBEPRESENT
4FLASHES=OPENLIMITSWITCH
0
4
3
2
1
REDLEDFLASHCODE
2FLASHES=PRESSURESWITCHSTUCKCLOSED/INDUCERERROR
3FLASHES=1STSTAGEPRESSURESWITCHSTUCK
OPEN/INDUCERERROR
5FLASHES=OPENROLLOUT/OPENFUSEDETECTED
6FLASHES=PRESSURESWITCHCYCLELOCKOUT
7FLASHES=EXTERNALLOCKOUT(RETRIES)
9
6
5
7
88FLASHES= EXTERNALLOCKOUT(RECYCLES)
9FLASHES+ GROUNDINGORREVERSEDPOLARITY
10FLASHES= GASFLOWWITHNOCALLFORHEAT
11FLASHES= LIMITSWITCHOPEN-BLOWERFAILURE
12FLASHES=IGNITORRELAYFAILURE
11
10
12
3DOUBLEFLASHES=2NDSTAGEPRESSURESWITCH
STUCKOPEN/INDUCERERROR
3FLASHES= W2PRESENTWITHNOW1
2FLASHES=NORMALOPERATIONWITH
CALLFOR2NDSTAGEHEAT
1FLASH=NORMALOPERATIONWITHCALLFOR
1STSTAGEHEAT(W1)
2
4
3
1
4FLASHES= YPRESENTWITHNOG CALL,YLO
PRESENTWITHNOGCALL
AMBERLEDFLASHCODE
RAPID=LOWFLAMESENSECURRENT
RAPID =NORMALOPERATIONWITHCALLFORFAN(G)
STEADYON=STANDBY
1FLASH= NORMALOPERATIONWITHCALLFOR
LOWSTAGECOOL(YLO+G)
0
2
1
GREENLEDFLASHCODE
2FLASHES=NORMALOPERATIONWITHCALLFORHIGH
STAGECOOL/ORSINGLESTAGECOOLING(Y+G)
0
1.SETHEATANTICIPATORONROOMTHERMOSTATAT0.7AMPS.
NOTES:
$
2.MANUFACTURER'S SPECIFIEDREPLACEMENTPARTSMUSTBEUSED
WHENSERVICING.
MUSTBEREPLACEDITMUSTBEREPLACEDWITHWIRINGMATERIAL
HAVINGATEMPERATURERATINGOFATLEAST105C.USECOPPER
CONDUCTORSONLY.
4.UNITMUSTBEPERMANENTLYGROUNDEDANDCONFORMTON.E.C.
ANDLOCALCODES.
5.TORECALLTHELAST6FAULTS,MOSTRECENTTOLEASTRECENT,
DEPRESSSWITCHFORMORETHAN2SECONDSWHILEINSTANDBY
(NOTHERMOSTATINPUTS)
3.IFANYOFTHEORIGINALWIREASSUPPLIEDWITHTHEFURNACE
S3
S2
T5
T3
T4
RD
COM
BK

5
50M58-707
TERMINAL
50M58-707 TYPICAL WIRING TABLE
TERMINAL
TYPE
SYSTEM COMPONENT
CONNECTION
W1 two-stage thermostat W1 terminal (or equivalent)
Gtwo-stage thermostat G terminal (or equivalent)
Rtwo-stage thermostat R terminal (or equivalent)
Ytwo-stage thermostat Y terminal (or equivalent)
YLO two-stage thermostat YLO terminal
TWIN one wire twinning terminal*
C
7 -screw
terminal
block two-stage thermostat C terminal (or equivalent)
MV COM (8) gas valve COMMON
MVH (1) gas valve SECOND STAGE
** Maximum recommended flame probe wire length is 36 inches
* For TWINNING applications, use only 50M58-707 Controls
24 VAC transformer (low voltage COMMON SIDE)
TR (9)
24 VAC transformer (low voltage HIGH SIDE)
TH (5)
flame sensor probe**
FP (3)
1st stage pressure switch INPUT
PS1 (12)
2nd stage pressure switch INPUT
PS2 (2)
high limit INPUT
HLI (6)
high limit OUTPUT
HLO (11)
MUST BE RELIABLY GROUNDED TO CHASSIS
GND (4)
MUST BE RELIABLY GROUNDED TO CHASSIS
GND (10)
MVL (7) gas valve FIRST STAGE
W2 two-stage thermostat W2 terminal (or equivalent)
IGN (1) ignitor HOT side
IGN N (5) ignitor NEUTRAL side
circulator blower terminal (TAP 1)
L1 1/4" spade terminal input voltage (120 VAC) HOT SIDE
T1
XFMR 1/4" spade terminal 24 VAC transformer line voltage HOT SIDE
EAC-H 1/4" spade terminal air cleaner HOT side
HUM 1/4" spade terminal humidifier HOT side
CIRC N 1/4" spade terminal circulator blower NEUTRAL terminal
LINE N 1/4" spade terminal input voltage (120 VAC) NEUTRAL SIDE
XFMR N 1/4" spade terminal 24 VAC transformer line voltage NEUTRAL SIDE
HUM N 1/4" spade terminal humidifier NEUTRAL side
EAC N 1/4" spade terminal air cleaner NEUTRAL side
T2 circulator blower terminal (TAP 2)
T3 circulator blower terminal (TAP 3)
circulator blower terminal (TAP 4)
inducer HIGH SPEED HOT side
IND HI (2)
IND LO (3) inducer LOW SPEED HOT side
IND N (4) inducer NEUTRAL side
T4
circulator blower terminal (TAP 5)
T5
circulator blower HOT SIDE
CIRC-H 1/4" spade terminal
X-13 motor low voltage returnCOM
IGNIND IND
N
LO
IND
HI
IGN
N
MVHPS2
GNDTH
MVLTR
HLOGNDPS1
FP
HLI
MV
COM
WIRING

6
Once the specified delay time has expired the second stage
valve will be energized.
When the second stage of the thermostat is satisfied, the inducer
motor is reduced to low speed and the second stage gas valve
is de-energized.
On the 50M58-707 control, the circulator will remain at high heat
speed for 30 seconds following the opening of the second stage
gas valve and then is reduced to low heat speed.
When the first stage of the thermostat is satisfied, the first stage
gas valve is de-energized and the HEAT delay-to-fan-off begins
timing.The inducer will postpurge for an additional 15 seconds,
then the inducer and humidifier will turn off. Upon completion
of the HEAT delay-to-fan-off period, the 50M58-707 circulator
is turned off. The electronic air cleaner on the control is also
de-energized at this time.
If flame is not detected during the trial-for-ignition period or if the
flame is detected/sensed and then lost before completion of 10
seconds of establishment, the gas valve is de-energized, the
ignitor is turned off, and the control goes into the “retry” sequence.
The “retry” sequence provides a 60-second wait with the inducer
interpurge following an unsuccessful ignition attempt (flame not
detected). After this wait, the ignition attempt is restarted. Two
retries will be attempted before the control goes into system
lockout.
If flame is established for more than 10 seconds after ignition,
the 50M58-707 controller will clear the ignition attempt (or retry)
counter. If flame is lost after 10 seconds, the control will restart
the ignition sequence.
A momentary loss of gas supply, flame blowout, or a shorted or
open condition in the flame probe circuit will be sensed within
2.0 seconds.The gas valve will de-energize and the control will
restart the ignition sequence.Recycles will begin and the burner
will operate normally if the gas supply returns, or the fault condi-
tion is corrected, before the last ignition attempt. Otherwise, the
control will go into system lockout.
If the control has gone into system lockout, it may be possible to
reset the control by a momentary power interruption of 10 seconds
or longer. Refer to SYSTEM LOCKOUT AND DIAGNOSTIC
FEATURES.
OPTION SWITCHES
Option switches on the 50M58-707 control are used to determine
the length of the delay-to-fan-off periods.The following tables show
the time periods that will result from the various switch positions.
HEAT OFF DELAY
DIP SW S3-3
S3-4
NOMINAL
(SECONDS)
OFF-OFF 90
OFF-ON 120
*ON-*OFF 150
ON-ON 180
W2 DELAY
DIP SW S3-1
S3-2
NOMINAL
(MINUTES)
*OFF-*OFF TWO STAGE
ON-OFF 10
OFF-ON AUTO
ON-ON 20
Average Calculated
Duty Cycle %
Low to High
Stage Delay
Demand
Equals or less than
0 38 12 minutes Light
38 50 10 minutes Light to Average
50 62 7 minutes Average
62 75 5 minutes Average to Heavy
75 88 3 minutes Heavy Light
88 100 1 minute Heavy
HEAT MODE
In a typical system, a call for first stage heat is initiated by closing
the W1 thermostat contacts. The inducer blower is energized
at high speed and the control waits for the low pressure switch
contacts to close. The humidifier (optional) is also energized at
this time. Once the low pressure switch contacts close, a pre-
purge is initiated. Then the inducer changes to low speed and
the 120V ignitor is powered.
At the end of the ignitor warm-up time, the first stage of the two
stage manifold gas valve is energized (low fire). Once flame
is detected, the HEAT delay-to-fan-on period begins. After the
delay-to-fan-on period ends, the 50M58-707 control will energize
the circulator fan at low heat speed. The electronic air cleaner
(optional) will also energize at this time.
For a two-stage thermostat, a call for second stage heat (W1
and W2) after a call for first stage heat will energize the inducer
at high speed and the circulator at high heat speed.The second
stage pressure switch contacts will close and energize the second
stage gas valve (high fire).
For a single-stage thermostat, when a call for heat occurs
(W1), a 10, 20 minute or auto mode heat staging timer will be
activated (timing is selectable with option switches S1-1 and
S1-2 positions). Following this delay, the second stage heat is
energized as above.
TheAUTO model algorithm is a method of energizing the second
stage gas valve based on the recent average of the heating duty
cycle. During a typical heating day, the low to high stage delay
is determined by using the average calculated duty cycle from
the table below.
OPERATION OPERATION
Cool Motor SPEED DIP SWITCH SETTING (S1-1, S1-2, S1-3)
*1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3 1 2 3
Position OFF OFF OFF ON OFF OFF ON ON OFF OFF ON OFF OFF OFF ON OFF ON ON ON OFF ON ON ON ON
Motor
SPEED
Cool
Ylo T4(60Hz) T3 T3 T4(60Hz) T4(60Hz) T3 T2 T2
YT4(120 Hz) T4(60Hz) T4(120Hz) T1 T2 T1 T4(120Hz) T3
*Factory default setting
Fan Motor SPEED DIP SWITCH SETTING (S2-2, S2-3, S2-4)
DIP SWITCH S2 SETTING
*2 3 4 2 3 4 2 3 4 2 3 4 2 3 4 2 3 4 2 3 4 2 3 4
Position OFF OFF OFF ON OFF OFF ON ON OFF OFF ON OFF OFF OFF ON OFF ON ON ON OFF ON ON ON ON
Motor
SPEED
Fan
GT1 T2 T3 T4(60Hz) T4(120Hz) T1 T1 T1
*Factory default setting
Heat Motor SPEED DIP SWITCH SETTING
(S1-4, S2-1)
*4 1 4 1 4 1 4 1
Position OFF OFF ON OFF ON ON OFF ON
Motor SPEED
Heat
W1 T1 T3 T3 T4(60Hz)
W2 T2 T2 T4(60Hz) T4(120Hz)
*Factory default setting

7
MANUAL FAN ON MODE
If the thermostat fan switch is moved to the ON position, the
circulator fan (low heat speed) and the electronic air cleaner
(optional) are energized. When the fan switch is returned to
the AUTO position, the circulator and electronic air cleaner are
de-energized.
TWINNING INTERFACE
The 50M58-707 is equipped with a single wire twinning interface.
If twinning is used, either control will process a call for heat,
cool or fan as described previously. However, after the heat- or
cool-on delay time expires, both units will energize the circulator
blowers at the same time. Likewise, after the heat- or cool-off
delay time expires, both units will de-energize the circulator at
the same time.This allows for the proper air flow to be obtained.
In a twinned application, the controls are able to communicate
no matter how the transformers are phased.
To enable twinning, connect the TWIN screw terminals on the
50M58-707 controls of the furnaces to be twinned to each other
using a single wire (14-22 AWG).
SYSTEM LOCKOUT AND DIAGNOSTIC FEATURES
SYSTEM LOCKOUT
When system lockout occurs, the gas valve is de-energized and
the low speed inducer blower and the low heat speed circula-
tor are energized. The electronic air cleaner (optional) will also
energize at this time. The diagnostic indicator light will flash to
indicate the system status.
To reset the control after system lockout, do one of the fol-
lowing:
1. Interrupt the call for heat at the thermostat for at least one
second but less than 20 seconds (if flame is sensed with
the gas valve de-energized, interrupting the call for heat at
the thermostat will not reset the control).
2. Interrupt the 24 VAC power at the control for at least 20
seconds.You may also need to reset the flame rollout sensor
switch.
3. After one hour in lockout, the control will automatically reset
itself.
LAST FAULT MODE
To retrieve fault codes, push and release the "LAST ERROR"
button for more than 1/5 second and less than 5 seconds.(Control
will indicate this period by solid GREEN for 1/5 to 5 seconds).
The LED will flash up to five stored fault codes, beginning with
the most recent. If there are no fault codes in memory, the LED
will flash two green flashes. The control will flash the most re-
cent error first and the oldest error last (last in first out). There
shall be 2 seconds between codes. Solid LED error codes will
not be displayed.
FAULT CODE RESET
To clear the fault code memory, push and hold the "LAST ER-
ROR" button for more than 5 seconds and less than 10 seconds.
(Control will indicate this period by RAPID GREEN FLASH for 5
seconds to 10 seconds.) The LED will flash three green flashes
when the memory has been cleared.
DIAGNOSTIC FEATURES
The 50M58-707 control continuously monitors its own opera-
tion and the operation of the system. If a failure occurs, the red
LED on the control will flash a failure code. If the failure is
internal to the control, the light will stay on. In this case,
the entire control should be replaced, as the control is not
field-repairable.
If the sensed failure is in the system (external to control), the
LED will flash in the following flash-pause sequences to indicate
failure status (each flash will last approximately 0.25 seconds,
and each pause will last approximately 2 seconds.)
During a second-stage error condition, the red LED when in
lockout will flash groups of double pulses.The red LED will flash
on for approximately 1/15 second then off for 1/15 second then
on for 1/15 second, then off for 3/10 second.The pause between
groups of flashes is approximately 2 seconds.
The diagnostics will indicate the specific fault through the
following codes:
COOL MODE
In a typical system, a call for cool is initiated by closing the ther-
mostat contacts Y or YLO and G. The circulator motor speed is
selected by Dip Switch S2 (refer to option switch S2 positions
table on page 6) for the thermostat input that is energized. Once
the control receives a call for cool, a 5 second cool on delay
time is activated. This allows the compressor to energize prior
to the indoor circulator being energized. After the thermostat is
satisfied, the compressor is de-energized and the control starts
a 45 second circulator off delay. After the cool off delay period
expired the indoor circulator is de-energized.
If a call for cool (YLO or Y) is received without a G input the
control will energize the indoor circulator motor as per DIP
switch 2 setting but will display an Amber 4 flash to alert that
the thermostat G input is not present.
OPERATION

DIAGNOSTIC TABLE
Green
LED
Flash
Amber
LED
Flash
Red LED
Flash
Error/Condition Comments/Troubleshooting
1 Flame sensed when no flame should be
present
Verify the gas valve is operating and shutting down properly. Flame in
burner assemble should extinguish promptly at the end of the cycle.
Check orifices and gas pressure.
2 Pressure switch stuck closed/ inducer
error
Pressure switch stuck closed. Check switch function, verify inducer is
turning off.
3 1st-stage pressure switch stuck open/
inducer error
Check pressure switch function and tubing. Verify inducer is turning on
the pulling sufficient vacuum to engage switch.
4 Open limit switch Verify continuity through rollout switch circuit.
5 Open rollout/open fuse detect Verify continuity through rollout switch circuit, check fuse.
6 1st-stage pressure switch cycle lockout if the first stage pressure switch cycles 5 times (open, closed) during
one call for heat from the thermostat the control will lockout. Check
pressure switch for fluttering, inconsistent closure or poor vacuum
pressure.
7 External lockout (retries) Failure to sense flame is often caused by carbon deposits on the
flame sensor, a disconnected or shorted flame sensor lead or a poorly
grounded furnace. Carbon deposits can be cleaned with emery cloth.
Verify sensor is not contacting the burner and is located in a good
position to sense flame. Check sensor lead for shorting and verify
furnace is grounded properly.
8 External lockout (ignition recycles
exceeded where flame is established
and then lost)
Check items for exceeded retries listed above and verify valve is not
dropping out allowing flame to be established and then lost.
9 Grounding or Reversed polarity Verify the control and furnace are properly grounded. Check and
reverse polarity (primary) if incorrect.
10 Module gas valve contacts energized
with no call for heat
Verify valve is not receiving voltage from a short. If a valve wiring is
correct and condition persists, replace module.
11 Limit switch open – possible blower
failure overheating limit
Possible blower failure, restricted air flow through appliance or
duct work. Verify continuity through limit switch circuit and correct
overheating cause.
12 Module Ignitor contact failure Fault code indicates the module ignitor contacts are not functioning
properly. Replace module.
Solid Module - internal fault condition Module contacts for gas valve not operating or processor fault. Reset
control. if condition persists replace module.
Rapid Twinning error Check wire connections. If condition persists, replace module.
3
double
2nd-stage Pressure Switch Stuck Open/
Inducer Error
Check pressure switch function and tubing. Verify inducer is turning on
and pulling sufficient vacuum to engage switch.
1 Normal Operation with call for first stage
heat
Normal operation - first stage
2 Normal Operation with call for second
stage heat
Normal operation - first stage
3 W2 present with no W1 Second stage call for heat on thermostat circuit with no call for first
stage. Verify dip switches are set for two stage thermostat and check
thermostat first stage circuit. Configured for a multi-stage thermostat the
Module will not initiate heating unless first stage call from thermostat is
received.
4 Y present with no G call Module will allow cooling to operate with only a "Y signal from the
thermostat but will also trigger this code. Verify thermostat is energizing
both "Y" and "G" on call for cool. Check "G" terminal connections.
Rapid Low flame sense current Low flame sense current is often caused by carbon deposits on the
flame sensor, a poorly grounded furnace or a mis-aligned flame sense
probe. Carbon deposits can be cleaned with emery cloth. Check for
improve furnace and module ground. Verify sensor is located in or very
near flame as specified by the appliance manufacturer.
1 Standby or Call for Cool Normal operation. Waiting for call from thermostat or receiving
thermostat call for cool.
Solid Standby
Rapid Normal Operation with call for fan (G)
1 Normal Operation with call for Low
stage cool (YLO + G)
2Normal Operation with call for High stage
cool/or single stage cooling(YLO + G)
TROUBLESHOOTING
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