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00079
CHECK SV4 CIRCUIT
• ACTIVATION: A problem has been detected in the SV4 coil circuit. If this alarm is activated while the unit is
operating in heat or defrost, the circuit is detected shorted. If this alarm is activated while the unit is operat-
ing in cool, the circuit is detected open.
• UNIT CONTROL: Alarm only.
• RESET CONDITION: Auto reset when the control system calls for SV1 to energize (heat, defrost or pulse)
and the SV1 coil circuit is normal, or when the control system calls for SV1 to be de-energized (cooling) an
the circuit is not shorted or Alarm may be manually reset using the display mounted keys or by turning the
unit off, then back on again.
NOTE: Follow the steps below until a problem is found. Once a repair or correction has been made, the active
alarm should clear itself (see reset condition above). Operate the unit through the appropriate modes to see if any
active alarm occurs. Continue with the steps below as necessary.
CORRECTIVE ACTIONS:
1.
Check for Additional Alarms
If this alarm is activated in conjunction with other alarms (00031, 00041, 00072, 00078, 00080, 00085
or 00086) check F5 & F10. Fuses must be good. Replace fuse(s) as required, clear alarms, restart and
check for repeat alarm(s).
2.
Check Coil
a. Inspect coil & connector pins & terminals. No damage to coil. No damaged or corroded pins
b. Check resistance of coil. Refer to
for specifications.
c. Use Component Test Mode (Refer to
) to test actual current draw of the circuit. Refer to
for specifications. Verify the actual current is within the specifications.
3.
Check Power and Wiring
a. Use Component Test Mode (Refer to
) to energize circuit. Check for power at SV4 termi-
nal A and 3MM-3. Minimum 11 VDC. If not, check connectors and wiring between terminals. Verify no
damage, moisture or corrosion.
b. Check for ground at SV4 terminal B (including SP-3) to GND RING1. Good ground. If not, check con-
nectors and wiring between terminals. Verify no damage, moisture or corrosion.
00080
CHECK CLUTCH CIRCUIT
• This alarm may be activated with earlier software revisions, follow procedure for alarm
.
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