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Operation (contd.)
HEAT (HEAT)
The heat light is on any time the thermostat has
signaled a call for heat which initializes the ignition
safety firing circuit -- the light comes on to indicate
successful firing of the main burners.
TROUBLESHOOTING (CONTROLS)
Example of troubleshooting with the assistance of the indicator lights.
TRANSFORMER
INCOMING
LINE VOLTAGE
THERM
AUX
PRESS
HEAT
FRONT PANEL LEDS
TRANSFORMER
INCOMING
LINE VOLTAGE
THERM
AUX
PRESS
HEAT
FRONT PANEL LEDS
Rev. C 1-22-04
LED OFF
LED LIT
CIRCUIT
REMOTE
BREAKER
THERMOSTAT
RELAY
PWR
TSTAT
RMT
POWER
SERVICE
WATER AT SELECTED TEMPERATURE.... NORMAL OPERATION
OR POOL/OFF/SPA THERMOSTAT SELECT SWITCH OFF.... NORMAL OPERATION
CIRCUIT
REMOTE
BREAKER
THERMOSTAT
RELAY
PWR
TSTAT
RMT
POWER
SERVICE
THERMOSTAT CALLING FOR HEAT - PUMP OFF(NO PRESSURE) BLOCKS FIRING
NORMAL OPERATION
SERVICE (SERVICE)
The service light is off during normal operation of
heater. The light only comes on if a problem with a
control has occurred or when the heater is first
firing. The problem must be investigated by the
serviceman prior to attempts to fire the heater again.
The diagrams that follow give examples of
troubleshooting a malfunctioning heater using the
assistance of the indicator lights.
SYMBOL TABLE
SWITCH OR DEVICE
SWITCH OR DEVICE
OPEN CIRCUIT
CLOSED CIRCUIT
(BLOCK CURRENT)
(PASS CURRENT)
HI TEMP
PRESS
TFUSE
LIMIT SWITCHES
PRESS
HI TEMP
SRVE
CLOSE IF
NO MV
THERMOSTAT CIRCUIT BOARD
HI TEMP
PRESS
TFUSE
LIMIT SWITCHES
PRESS
HI TEMP
SRVE
CLOSE IF
NO MV
THERMOSTAT CIRCUIT BOARD
A-5
IGNITION MODULE
IND
GND
VAL
TFUSE
MV
HEAT
IGNITION MODULE
IND
GND
VAL
TFUSE
MV
HEAT
27
GAS VALVE
MV
MV
GAS VALVE
MV
MV
P/N 472128

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