Henny Penny AHC-990, Technical Manual

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Model AHC-990/993
1-3
OPERATION (Continued)
C. Product dry • Bad float switch • Replace float switch
• Bad water heater high limit • Replace high limit
• Bad water heater • Check heater and replace if bad;
see Tech Mode item 18
• Humidity setpoint too low • Increase humidity setpoint
(SP-4) in Special Program Mode
• No water in pan • Turn water supply on
• Adjust flow control valve
• Check solenoid valve and relay
• Vent stuck open (“E-80”) • Bad vent motor - replace; see
Tech Mode item 18
• Bad vent motor relay - replace
• Check alignment and condition
of mechanical vent parts
HEATING SYSTEM
A. Unit not heating • Bad control board • Replace control board
• Bad high limit • Check high limit; replace if bad
• Bad air heater or blower relays • Replace relay
• Bad air heater • Check heaters and replace if bad;
see Tech Mode item 18
• Faulty wiring • Check for loose connections or
broken wires
B. Unit not reaching set • Blower not working. • Check Blower and replace if bad;
temperature see Tech Mode item 18
• Bad air heater • Check heaters and replace if bad;
see Tech Mode item 18
• Bad air heater, or blower relays • Replace relay
• Doors left open • Keep doors closed except
to load and serve product
• Door gasket torn or worn • Replace bad door gaskets
1-3. TROUBLESHOOTING (continued)
Problem
Cause Correction
Feb. 2011