HARDY MANUFACTURING CO., INC (MODEL H25) PAGE 27
Section VII
7-5
Trouble Shooting Guide H25
NO HEAT
Main power
supply and
ground fault
interrupter
receptacle “OK”
Water
temperature is
“HOT”
Pump Performance
Unplug pump and bypass relay by tying relay wires #4 and #6
together. Plug pump back in.
Pump does not run
1 Defective pump
cartridge
2 Defective pump
capacitor
3 Defective pump
motor winding
1 Unplug pump. Remove pump.
Pull cartridge from pump and
spin impeller by hand. If
impeller will not spin, replace
cartridge.
2 Use Ohmmeter. When the
meter is connected to the
capacitor, the needle should
jump to “0” ohms and slowly
drift back to infinity. Replace
if defective.
3 Disconnect the wires
connected to the motor
terminals to test the motor
independent of electrical
connections. Check for
ground and continuity with
ohmmeter The insulator of the
windings should show no
breakage. If it does, replace
pump
Pump does run
1 Defective 24 volt
transformer
2 Defective wall
thermostat (heater)
3 Defective low
temperature sensor
4 Defective pump relay
1 Located at existing central
unit. If 115/120 volts is being
supplied to primary side
check for 24 volts on
secondary. If 24 volts not
present, replace transformer.
2 Located inside home.
Remove cover. Check for 24
volts. Level the mounting
base. Blow dust from sensing
bimetal. Adjust heat
anticipator. See owners
manual connection
instructions.
3 Remove wires on sensor and
connect to each other to
bypass. If pump runs replace
low temperature sensor.
4 Check relay terminals #7 &
#8 for 24 volts. If 24 volts is
present, use ohmmeter to
check contacts. Connect
ohmmeter to terminals #4 &
#6. If no reading replace
relay.
COMPLAINT
AREA OF TROUBLE
POSSIBLE CAUSES
CORRECTIVE ACTION
Содержание H25
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