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How to Check simply the main part
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(1) Capacitor charge fault (Fault with outdoor unit) (AP1 below refers to the outdoor control panel)
Use AC voltmeter to check if the voltage between terminal L and N on the wiring board is within 210VAC~240VAC.
Main Check Points:
If the reactor (L) is correctly connected? If the connection is loose or fallen? If the reactor (L) is damaged?
Fault diagnosis process:
Switch on the unit
and wait 1 minute
Use DC voltmeter
to measure the
voltage on the two
ends of electrolytic
capacitor (test3)
Voltage higher than 200V?
Fault with the voltage
testing circuit on
control panel AP1
Replace the control
panel AP1
Measure the AC voltage between
terminal L and N on wiring board
XT
Voltage within
210VAC~250VAC?
Switch off the power
and repair the supply
power to restore the
voltage to
210VAC~250VAC
Re-energize and
switch on the unit
If the fault is eliminated?
Switch off the power and wait 20 minutes; or
use DC voltmeter to measure the voltage on the
two ends of capacitor (test3), until the voltage
is lower than 20V
Check the
connection of reactor
(L in the Electrical
Wiring Diagram)
If the wiring of
reactor L is normal?
Connect the reactor L
according to Electrical
Wiring Diagram
Re-energize and
switch on the unit
If the fault is eliminated?
End
Replace the control
panel AP1
Troubleshooting Guide
Summary of Contents for EVJC 12
Page 2: ...74 74...
Page 30: ...102...
Page 32: ...104 www johnsoncontrols com...
Page 34: ...106 by johnson controls 2...
Page 46: ...118...
Page 48: ...120 www johnsoncontrols com...
Page 49: ...121 High Wall EVHC 09 to 12 DSAAAR SERVICE MANUAL SM EVHC D 09 12GB 05 10 EVHC 09 EVHC 12...
Page 65: ...137 LULQJ LDJUDP Schematic Diagram Indoor Unit Schematic Diagram...
Page 66: ...138 Schematic Diagram Outdoor Unit...
Page 69: ...141 TOP VIEW Schematic Diagram BOTTOM VIEW 1 3 4 5 6 2 7 8 9 10 11 12 Outdoor Unit...
Page 113: ...185 Exploded View Exploded View Indoor Unit...
Page 114: ...186 Exploded View Outdoor Unit...
Page 118: ...190 High Wall EVHC 18 to 24 DSAAAR SERVICE MANUAL SM EVHC D 18 24GB 05 10 EVHC 18 EVHC 24...
Page 132: ...204 LPHQVLRQV Dimensions QGRRU 8QLW Tube exit Air inlet Right Left Ceiling W D H 02 18K 24K...
Page 133: ...205 890 340 955 560 380 424 700 60cm 60cm 60cm 60cm LPHQVLRQV Outdoor Unit Bolt Nut Spanner...
Page 140: ...212 TOP VIEW Schematic Diagram BOTTOM VIEW 1 2 3 4 5 6 7 8 9 7 8 9 10 11 12 13 1 2 3 4 5 6 10...
Page 142: ...214 Schematic Diagram Key testing spot bottom...
Page 197: ...269 Exploded View Exploded View Indoor Unit 78 Model EVKC 18 DS...
Page 198: ...270 Exploded View Model EVKC 24 DS 79...
Page 199: ...271 Exploded View Outdoor Unit 80...