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Troubleshooting by Indication on the Remote Controller
SiUS28-902_a
121
Troubleshooting
3.28 “
L1
” Outdoor Unit: Malfunction of P.C.B.
Remote
Controller
Display
L1
Applicable
Models
RZQ18~30PVJU
Method of
Malfunction
Detection
Detect malfunctions by current value during waveform output before compressor startup.
Detect malfunctions by current sensor value during synchronized operation at the time of
startup.
Detect malfunctions using an SP-PAM series capacitor overvoltage sensor.
Malfunction
Decision
Conditions
In case of overcurrent (OCP) during waveform output
When the current sensor malfunctions during synchronized operation
When overvoltage occurs in SP-PAM
In case of IGBT malfunction
Supposed
Causes
Faulty outdoor P.C.B. (A1P)
•
IPM failure
•
Current sensor failure
•
SP-PAM failure
•
Failure of IGBT or drive circuit
Troubleshooting
YES
N
O
T
u
rn OFF the po
w
er
s
u
pply once and then t
u
rn
it O
N
again.
Does
it ret
u
rn normally?
External factor other
than malf
u
nction (for
example, noise etc.).
Replace the o
u
tdoor
P.C.B. (A1P).
P.C.B. e
qu
ipped
w
ith a
resin case
( )
Caution
Be s
u
re to t
u
rn off the po
w
er s
w
itch
b
efore connecting or disconnecting
the connector, or parts co
u
ld
b
e damaged.
Summary of Contents for SkyAir FCQ18PVJU
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Page 44: ...Other Control SiUS28 902_a 37 Function...
Page 81: ...SiUS28 902_a Troubleshooting by Remote Controller Troubleshooting 74...
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