Daikin Maverick I Installation And Maintenance Manual page 82

Alarm Designation
Smoke Detection
(Selectable Fault
Controller
Response)
Low Pressure – Circuit 1
Problem - Lockout Controller
Low Pressure – Circuit 2
Problem - Lockout Controller
High Pressure– Circuit 1
Problem - Lockout Controller
High Pressure– Circuit 2
Problem - Lockout Controller
McQuay OM 1077
Origin
DDC DDC Controller reads the smoke detection input as
open -- complete shutdown.
If the low pressure switch trips 3 times within 120
minutes of operation during the same call for heating
DDC
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
DDC
lock-out mode when the outdoor ambient
temperature rises above 5 °F. LPS is ignored during
defrost.
The DDC Controller recognizes an open high
pressure switch after two seconds from its
DDC
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
DDC
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.
Description
Alarm List
Status/Troubleshooting Information
• If not due to a fire
• Replace the sensor
• Check sensor is installed correctly on control
• Unit has low refrigerant charge
• Indoor coil frozen
• Dirty indoor coil or filter
• Expansion valve in not operating correctly
• 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
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