Electrical Maintenance
52
4. Check for battery voltage at the 7EB and 7EC
terminals on the PSM. Battery voltage should
be present on one of these terminals when AC
voltage is present on L1, L2, and L3. If not,
replace the relays on the PSM with relays that
function properly and recheck the voltage on
the 7EB and 7EC terminals. If battery voltage
is not present, the PSM is faulty.
5. Check for battery voltage at the 7EB terminal
on MC1 and at the 7EC terminal on MC2.
Battery voltage should be present at one of
these terminals. If not, check the continuity of
the 7EB and 7EC wires.
6. Check the continuity of the RED wires on the
motor contactors. The RED wires must have
continuity.
7. Check the CH circuit at MC1 and MC2 for
continuity to a chassis ground. If the CH
circuits do not have continuity to a chassis
ground, check the CH wires.
8. Check the continuity of the BLK wires on the
motor contactors. The BLK wires must have
continuity.
9. If the CH circuits and BLK wires do have
continuity to CH, the contactor that has
battery voltage present at 7EB (MC1) or at
7EC (MC2) is faulty.
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Страница 25: ...Unit Description 25 Figure 3 Zone 1 Cool Zone 2 Cool and Zone 3 Cool Zone 3 Zone 2 Zone 1 AGA168 ...
Страница 27: ...Unit Description 27 Figure 4 Zone 1 Cool Zone 2 Cool and Zone 3 Heat Zone 3 Zone 2 Zone 1 AGA169 ...
Страница 30: ...Unit Description 30 Figure 9 Front View AJA920 ...
Страница 31: ...Unit Description 31 1 Access Panels 2 Defrost Damper Figure 10 Back View 1 2 ARA104 ...
Страница 114: ...Mechanical Diagnosis 114 ...
Страница 116: ...Electric Standby Diagnosis 116 ...
Страница 120: ...Remote Evaporator Specifications 120 ...
Страница 122: ...Remote Evaporator Maintenance Inspection Schedule 122 ...
Страница 128: ...Remote Evaporator Electrical Maintenance 128 ...
Страница 132: ...Remote Evaporator Refrigeration Service Operations 132 ...
Страница 134: ...Remote Evaporator Structural Maintenance 134 ...
Страница 136: ...Remote Evaporator System Diagnosis 136 ...
Страница 140: ...Index 140 ...
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Страница 143: ...143 Model 30 Schematic Diagram Page 1 of 2 ...
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Страница 145: ...145 Model 30 Wiring Diagram Page 1 of 4 ...
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Страница 149: ...149 Model 50 Schematic Diagram Page 1 of 2 ...
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Страница 151: ...151 Model 50 Wiring Diagram Page 1 of 5 ...
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