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Section II TROUBLESHOOTING - 506780084
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TM-5-4120-359-14 Air Conditioner Split Package 18 000 BTU/HR Cooling 30 000 BTU/HR Heating 208 Volt 3 Phase 400 Hertz Manual
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Table 4-1. TROUBLESHOOTING (cont.) - 506780086
TM 5-4120-359-14
Table 4-1. TROUBLESHOOTING (cont.)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 5.
Check that AC power is being supplied.
WARNING
The following test must be conducted with the power on.
Exercise extreme
caution.
(a) Disconnect power cable at washboard connector on front of shelter.
REMOTE CONTROL CABLE IDENTIFICATION
AT WASHBOARD
(W86-P1 CURBSIDE CABLE)
(W88-P1 ROADSIDE CABLE)
POWER CABLE IDENTIFICATION AT WASHBOARD
(W22-P1 CURBSIDE CABLE)
(W21-P1 ROADSIDE CABLE)
(b) Apply power.
(c) Trip and reset circuit breaker.
(d) Check for nominal 208 Vac between pins AB, AC, BC of washboard connector.
If 197 to 229 Vac is not present in all three phases refer problem to shelter maintenance
personnel.
Step 6.
Check thermal protector circuit of switch 6 (in evaporator blower motor B3).
(a) Remove power.
(b) Measure resistance between connector contacts B and N of remote cable at washboard or P14
behind remote control assembly.
4-3

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