62-11389
7
−
87
Alarm
NO.
Steps
Alarm/Cause
Corrective Action
P186 CHECK EVAP OUTLET TEMP
•
TRIGGER–ON: Evaporator Outlet Temperature Sensor (EVOT) is not within the range of -53 to
+158
°
F (-47 to +70
°
C.)
•
UNIT CONTROL:
Engine and Standby Operation: Pretrip will fail and display
“PRETRIP FAIL AND COMPLETED”.
•
RESET CONDITION: Auto Reset if Pretrip is started again, or alarm may be manually reset via
keypad or by turning the unit off, then back on again.
Check Sensor - refer to procedure for alarm 131
P187 CHECK HEATER 1 CIRCUIT
This device is checked twice in Pretrip - once in Test 2 and again in Test 8.
•
TRIGGER–ON TEST 2 (unit not running): Normal draw for the 1HTCON1 relay coil is 0.05 to 1.0
Amps (12 VDC). The circuit tests outside this range.
•
TRIGGER–ON TEST 8 (unit running): Normal draw for the 1HTCON1 heaters is 1.0 to 3.5 Amps
(460 VAC). The circuit tests outside this range.
•
UNIT CONTROL:
Engine and Standby Operation: Pretrip will fail and display
“PRETRIP FAIL AND COMPLETED”.
•
RESET CONDITION: Auto Reset if Pretrip is started again or alarm may be manually reset via
keypad 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, clear the
alarm(s). (See Note 1 page 7
−
2.) Operate the unit through the appropriate modes to see if any active alarm
occurs. Continue with the steps below as necessary.
1
Determine Which Test This Alarm Occurred In
a. Review active alarm list.
Make a note of all alarms.
b. Clear active alarm list.
c. Restart and monitor Pretrip.
Stop Pretrip during Test #3 by holding = Key for 6
seconds.
d. Review active alarm list for Alarm
187.
If alarm is present, follow steps 2 thru 5 If alarm is
not present, follow steps 6 thru 9.
12 VDC
CIR-
CUIT
2
Check 1HTCON1
a. Inspect heater contactor coil and
wire connections.
No damage to coil.
Wire connections to contactor coil are tight.
No damaged or corroded wires to contactor coil.
b. Check contactor coil resistance.
Refer to Section 2.12 for correct electrical values.
3
Check 1HTCON1 Amp Draw
Check 1HTCON1 amp draw.
Use Component Test Mode (Section 5.2.2) to test.
Refer to Section 2.12 for correct electrical values.
View current draw in Data List.
4
Check 1HTCON1 Wiring
Inspect harness & control box con-
nector pins & terminals. (See wiring
schematic Section 10.)
No physical damage to harness.
No damage, moisture, or corrosion in connectors.
5
Check Evaporator High Temperature Switch (EVHTS)
Inspect for open EVHTS per wiring
schematic Section 10.
If open, replace switch as required.
Additional steps on the next page.
