Low Pressure System (Lps) Malfunction - Daikin Skyair FHC35K Service Manual

Troubleshooting by Remote Controller Display / LED Display
6.12

Low Pressure System (LPS) Malfunction

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Remote Controller
Display
Outdoor Unit LED
A(H1P)
Display
Applicable Models
R(Y)
Method of
Continuity of the low pressure switch is detected by the safety device circuitry.
Malfunction
Detection
Malfunction Case where low pressure switch is actuated when the compressor is operating
Decision
Conditions
Supposed Causes
<Causes related to PC boaed>
„ 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
110
ñ ò
ýýý 1(H2P)
2(H3P)
Is
LPS
for safety
NO
connected to the
outdoor unit PC
board?
YES
Turn off the power
supply and check the
following after letting
the compressor rest
for 2 or 3 minutes.
Does
the LPS for NO
safety have
continuity?
YES
ó
Is low
pressure
YES
during operation
abnormally
low?
NO
Connect correctly
Replace HPS without continuity.
Malfunction of refrigerant piping circuit
Replace outdoor unit PC board.
(SF014)
Troubleshooting
Si-71A