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www.DaikinApplied.com 33
OM 1077-1 • MAVERICK I
Alarm Designation
Origin
Description
Status/Troubleshooting Information
Smoke Detection (Selectable Fault Response)
DDC Controller
DDC Controller reads the smoke detection input as
open – complete shutdown.
• If not due to a fire
• Replace the sensor
• Check sensor is installed correctly on
control
Low Pressure – Circuit 1 Problem - Lockout
DDC Controller
If the low pressure switch trips 3 times within
120 minutes of operation during the same call
for heating operation, the control will lock out
compressor and outdoor fan operation. If the
lock-out due to low pressure occurs at an outdoor
ambient temperature below 5 °F, the control will
automatically exit the lock-out mode when the
outdoor ambient temperature rises above 5 °F. LPS
is ignored during defrost.
• Unit has low refrigerant charge
• Indoor coil frozen
• Dirty indoor coil or filter
• Expansion valve in not operating
correctly
Low Pressure – Circuit 2 Problem - Lockout
DDC Controller
High Pressure– Circuit 1 Problem - Lockout
DDC Controller
The DDC Controller recognizes an open high
pressure switch after two seconds from its
occurrence. Since the high pressure switch is wired
in series with the compressor relay, the compressor
shuts down immediately until the pressure switch
is closed again AND the anti-short cycle delay is
expired. Three occurrences of a high pressure
switch within the same call will lock the circuit out.
The lockout is reset by removing the call.
• Outdoor coil is dirty
• Outdoor fan is not running
• Dirty indoor coil or filter
• Indoor blower is not running
• Liquid line restriction
• Excessive refrigerant charge
High Pressure – Circuit 2 Problem - Lockout
DDC Controller
