Servicing Refrigerant Sensors Or Switches; Servicing Optional Electric Heater; Servicing The Compressor Ground Fault Interrupter; Phase Voltage Monitor (Pvm) - Daikin DPS005 Installation And Maintenance Manual

Servicing Refrigerant Sensors or Switches

Severe loss of charge may occur if the high
refrigerant pressure switch is replaced before
reclaiming the refrigerant . Replace pressure switch
after reclaiming refrigerant.

Servicing Optional Electric Heater

Hazardous voltage . May cause severe injury or
death .
Disconnect electric power before servicing equipment.
More than one disconnect may be required to de-
energize the unit.
If the electric heater is not operating properly, a qualified
electrician should perform the following to check if the heater is
damaged:
1 . Measure continuity through all fuses.
2 . Check that all electrical connections are tight. Look for
signs of arcing.
3 . Check the resistance to ground for each circuit. It should
be infinite.
4 . Check the resistance phase to phase for each circuit.
5 . Check all contactors.
Servicing the Compressor Ground Fault
Interrupter
The Rebel 003–015 units are equipped with a ground fault
interrupter on the compressor(s). This is a two part device with a
current sensing donut on the power wires to the compressor(s)
and a PCB. The device is intended for personal safety by
continuously monitoring the balance between the three phase
power and the neutral conductor. It is not intended to provide
overcurrent or short circuit protection to the equipment.
The device works by opening the 120V controls circuit in a fault
condition. An open condition on the ground fault interrupter
indicates the compressor has been grounded.
Figure 79: Ground Fault Interrupter
www.DaikinApplied.com
CAUTION
DANGER

Phase Voltage Monitor (PVM)

The phase voltage monitor
three-phase loads from damaging power conditions. A
microprocessor-based voltage and phase sensing circuit
constantly monitors the three-phase voltages to detect harmful
power line conditions. When a harmful condition is detected,
its output relay is deactivated after a specified trip delay (Trip
Delay). The output relay reactivates after power line conditions
return to an acceptable level for a specified amount of time
(Restart Delay). The trip and restart delays prevent nuisance
tripping due to rapidly fluctuating power line conditions.
There are two LEDs on the face of the PVM ("1" in
to indicate the following items in
Figure 80: Phase Voltage Monitor
Table 34: LED Indication
Status
Normal operation, no faults, relay
energized
Loss of input phase (relay
deenergized)
Voltage unbalance (relay deenergized)
High or low voltage (relay de-
energized)
Phase reversal (relay deenergized)
Restart delay (fault cleared, PVM
pending restart, relay de-energized)
Other features:
• Standard 2% to 8% variable voltage unbalance ("3" in
Figure 80).
• Standard 1 to 500 second variable restart delay ("2").
• Standard 1 to 30 second trip delay ("4") (except loss of
phase, which trips at 1 second non-adjustable).
101
M
aInTenanCe
(Figure 80) is designed to protect
Figure
Table 34 .
LED Indicator
Green LED - steady on
Red LED - flash twice, off, flash twice,
off, etc.
Red LED - flash twice, off, flash twice,
off, etc.
Red LED - steady on
Red LED - pulse on, off, on, off, etc.
Green LED - pulse on, off, on, off, etc.
IM 1125-7 • REBEL ROOFTOPS
80)