Daikin RZP100DVAL [161/255] Low pressure system lps malfunction

Daikin RZP100DVAL [161/255] Low pressure system lps malfunction
Troubleshooting by Remote Controller Display / LED Display SiE25-110
152 Troubleshooting
6.17 Low Pressure System (LPS) Malfunction
Remote
Controller
Display
E4
Outdoor Unit LED
Display
HAP 5 H1P 4 H2P 3
Applicable
Models
RZP71~140D
Method of
Malfunction
Detection
Continuity of the low pressure switch is detected by the safety device circuitry.
Malfunction
Decision
Conditions
Case where low pressure switch is actuated when the compressor is operating
Supposed
Causes
<Causes related to PC board>
Failure of low pressure switch
Low pressure switch’s harness is broken or disconnected
Failure of low pressure switch’s connector connection
Failure of outdoor unit PC board
<Causes related to product as a whole>
Malfunction of refrigerant piping circuit
Troubleshooting
Is low
pressure during
operation abnormally
low?
NO
NO
NO
Is
LPS for
safety connected to the
outdoor unit PC
board?
Does
the LPS for
safety have
continuity?
YES
YES
YES
Turn off the power supply
and check the following
after letting the
compressor rest for 2 or 3
minutes.
Connect correctly
Replace LPS without continuity.
Malfunction of refrigerant piping
circuit
Replace outdoor unit PC board.
(S1171)
Caution
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.

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