Rheem Raypak 2450, Installation And Operation Manual

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Troubleshooting
Before troubleshooting the system, ensure that:
• All mechanical and electrical connections are secure and tight
• All system wiring is correct
• Fuse is not blown (3A Automotive “ATO” type fuse for 24VAC)
• That a system ground is properly connected to the heater. Nuisance shutdowns are often caused by a poor or
erratic ground.
The service display can be accessed by pressing and holding the UP and MENU buttons for 3+ seconds. The service
display does not affect operation of the unit which continues to operate in the background. When in this mode, pressing
the UP or DOWN buttons will toggle through the various information reported. Some items (Fault History and Sensor
Temperatures) have multiple values (press UP or DOWN buttons to scroll through the additional information). The
service display mode may be exited to return to the previous display be pressing the UP and MENU buttons or it will
automatically be exited if no button is pressed within 60 seconds.
Operational Status Messages
The following operational status messages are displayed in Pool, Spa, and Remote operating modes.
Table H. Operational Status Messages
Message Description Recommended Troubleshooting
Comp Start Delay Notification that the compressor
is under a 3-minute delay before
turning On. This can be bypassed by
pressing the UP and DOWN buttons
simultaneously.
Nothing wrong – just notification as to why the unit is not
currently operating.
Valve Chng Delay Notification that the 3-way valves are
being commanded to change positions
Pool to Spa or Spa to Pool.
Nothing wrong – just notification as to why the unit is not
currently operating.
WPS Closed 3-way valves not switched because
water pressure switch still closed.
Check settings – pump operation Disabled?
Defrost Unit is performing a Defrost cycle. Nothing wrong – just notification as to why the unit is not
currently operating.
Heating Unit is operating and running a heating
cycle.
N/A
Cooling Unit is operating and running a cooling
cycle.
N/A
External Heat The AUX Mode setting is set to
EXTERNAL HEAT meaning an external
device (solar heating system) is running
1st stage instead of the heat pump.
Verify desired settings.
Outside Lockout The compressor is not running because
the ambient temperature is too cold as
measured by the Ambient sensor.
Verify Outside Lockout temperature setting.
Check Amb Temp sensor value in Installer sub-menu and
replace if value is inconsistent with ambient temperatures.
Disable this function in the Installer/Service sub-menu if
Outside Lockout is not desired.
No Demand Demand has been satisfied and the unit
is in standby.
N/A