Groen CC20-E Operator's Manual page 207

Probable Cause
Relay board and/or
control panel
operation.
Relay board may be
defective.
Faulty control panel.
Boiler fill solenoid may
be defective.
Water inlet valve may
be defective.
Improper drain valve
(DV1) operation.
(Revised 1/02)
Corrective Action
Perform relay board power
supply check.
Replace relay board or flex cable.
Replace control panel.
Check if there is 24VAC across WV1A.
No 24VAC present. Check wiring
continuity. If necessary, replace broken
wire or end of wire connector.
24VAC measured. Test solenoid.
Replace water inlet valve.
Check if drain valve is closed.
If open, replace drain valve, DV1.
Table 3 - Troubleshooting Service Code 3 - Continued
Test Equipment
Voltmeter
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Voltmeter
Digital ohmmeter
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SERVICE CODES
Service Code 3
Service
Reference
Location
Page 8-3
Page 8-22
Page 8-21
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Page 8-6
Page 8-25
Page 8-27
6-13