Daikin MicroTech III DPS Installation And Maintenance Manual page 42

Discharge Line Refrigerant Pressure Sensor
Problem – (PTD Sensor: Problem)
This alarm occurs when the suction line pressure inputs (PTD)
remains above 611 .6 psi or below 1 .42 psi continuously for 10
seconds .
When this alarm is active compressor cooling and heating
operation are disabled .
The alarm must be manually cleared once corrective action is
taken .
Interface Board Communication Problem – (IFB
Comm: Problem)
This alarm occurs when a communication problem is detected
at any of the communication connections to the IFB board .
When this alarm is active compressor cooling and heating
operation are generally disabled .
The alarm normally is cleared automatically when the
communication problem is corrected . If the alarm occurs for a
fifth time in a 24 hour period it must be manually cleared once
corrective action is taken .
Low Refrigerant Pressure Differential Problem –
(Lo Press Diff: Problem)
This alarm occurs when the Low Differential Pressure
Unloading function has forced compressor operation to the
Standby state for a third time in a 30 minute period .
When this alarm is active compressor cooling and heating
operation are disabled .
The alarm must be manually cleared once corrective action is
taken .
Low Refrigerant Pressure Problem –
(Lo Press 1: Problem)
This alarm occurs when either the Cooling Low Pressure
Unloading or the Heating Low Pressure unloading function has
forced compressor operation to the Standby state for a third
time in a 30 minute period .
When this alarm is active compressor cooling and heating
operation are disabled .
The alarm must be manually cleared once corrective action is
taken .
OM 1263 • MICROTECH UNIT CONTROLLER
High Refrigerant Pressure Problem –
(Hi Press 1: Problem)
This alarm occurs when either the Cooling High Pressure
Unloading or the Heating High Pressure unloading function has
forced compressor operation to the Standby state for a third
time in a 30 minute period . This alarm also occurs if either of
the mechanical high pressure switches (HP1 or HP3) open .
When this alarm is active compressor cooling and heating
operation are disabled .
The alarm must be manually cleared once corrective action is
taken
High Inverter Compressor Body Temperature –
(HiINVCmpT: Problem)
If the inverter compressor body temperature rises above
245°F continuously for 5 seconds or 230°F for 10 minutes,
the inverter compressor is shut down . After remaining in the
standby for restart state for one cooling stage time period the
compressor is allow to restart . If this occurs three times in a
100 minute time period, the High Inverter Compressor Body
Temperature problem occurs. The cooling will then remain off
until this alarm is manually cleared through the unit keypad or
via a network signal .
Inverter Compressor Body Temperature Sensor
Problem – (INVCmpTSnsr: Problem)
If the inverter compressor body temperature sensor becomes
shorted or open circuited or out of range for longer than
the Sensor Alarm Delay (Default= 30 seconds) . When this
alarm is active compressor cooling and heating operation
are disabled . The alarm must be manually cleared once
corrective action is taken .
Variable Compressor Oil Problem - (Var Comp
Oil Problem)
This alarm occures when either the variable compressor
has been operating at the max speed or for the oil boost
time period and the low oil flag is still active or the maximum
number of oil boost cycles within a 24hr period have occurred .
When this alarm is active compressor cooling and heating
operation is disabled .
The alarm must be manually cleared once corrective action is
taken .
42
Alarms
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