Servicing should only be performed by a Qualified Service Agent
75
TROUBLESHOOTING
Control System Unresponsive (cont)
DISPLAYED MESSAGE
CONDITION/INDICATES
CHECK/REPAIR
UIM is Inoperable
UIM does not respond to any user input using the
operational and/or Up and Down buttons.
• Ensure Ribbon Cable from the Button overlay is
inserted correctly in UIM J3 Socket (page 55).
• Call the technical support phone number on the
back cover of this manual for further assistance
if the problem has not been corrected after per-
forming the procedure outlined here.
Heating Cycle Disabled
Control System not activating call
for heat with cold tank of water.
Thermometer Icon on Desktop
Screen (see page 58) appears
with diagonal line as shown here.
Possible Causes:
Fault condition active
Enable/disable circuit(s) open
• Check for and correct any active Fault condition
- see Current Fault Menu page 71.
• Check enable/disable circuits - ensure both cir-
cuits are closed; follow procedure outlined on
page 53.
• Call the technical support phone number on the
back cover of this manual for further assistance
if the problem has not been corrected after per-
forming the procedure outlined here.
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