Malfunction Of Electronic Expansion Valve - Daikin Skyair FHC35K Service Manual

Si-71A
6.13

Malfunction of Electronic Expansion Valve

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Remote Controller
Display
A(H1P) — ýýý 1(H2P) — 2(H3P) —
Outdoor Unit LED
Display
Applicable Models
R(Y)
Method of
With electronic expansion valve malfunction detection, coil current is detected and open and short circuits
Malfunction are detected.
Detection
Malfunction Malfunction is determined by the following condition.
Decision
Coil current: open circuit < normal < short circuit
Conditions
„ Failure of electronic expansion valve
Supposed Causes
„ Electronic expansion valve's harness is broken or disconnected.
„ Failure of electronic expansion valve's connector connection
„ Failure of outdoor unit PC board
„ Outside cause (noise, etc.)
Troubleshooting
Troubleshooting
Turn the power
supply off once and
then back on.
YES
Normal reset?
NO
Troubleshooting by Remote Controller Display / LED Display
Is
resistance
of electronic NO
expansion valve's
coil normal?
(40-50Ω)
YES
Could be outside cause (noise, etc.)
other than malfunction.
Failure of electronic expansion valve
Outdor unit PC board replacement
(SF015)
111