167
Mainly detect:
(2) IPM Protection, Out-of-step Fault, Compressor Phase Overcurrent (AP1 below refers
to the outdoor control panel)
If the connection between control panel AP1 and compressor COMP is secure? If loose? If the connec-
tion is in correct order?
If the voltage input of the machine is within normal range? (Use AC voltmeter to measure the voltage
between terminal L and N on the wiring board XT)
If the compressor coil resistance is normal? If the insulation of compressor coil against the copper tube
is in good condition?
If the working loads of the machine are too high? If the radiation is good?
If the charge volume of refrigerant is correct?
Fault diagnosis process:
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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...