Carrier VECTOR 1800 MT - Page 230

62-11039
7-99
Alarm
NO.
Steps ALARM / CAUSE CORRECTIVE ACTION
P189 CHECK EVAPORATOR FAN MOTOR
This device is checked twice in pre--trip -- once in Test 2 and again in Test 8.
• TRIGGER–ON TEST 2: Normal amps for the 1EVCON contactor coil are .05 to 2.0 D/C Amps (12 VDC).
The circuit tests outside this range.
•
T
R
I
G
G
E
R
–
O
N
T
E
S
T
8
:
N
o
r
m
a
l
a
m
p
s
f
o
r
t
h
e
C
o
m
p
a
r
t
m
e
n
t
1
E
v
a
p
o
r
a
t
o
r
F
a
n
m
o
t
o
r
s
a
r
e
0
.
7
t
o
3
.
5
A
/
C
•
T
R
I
G
G
E
R
–
O
N
T
E
S
T
8
:
N
o
r
m
a
l
a
m
p
s
f
o
r
t
h
e
C
o
m
p
a
r
t
m
e
n
t
1
E
v
a
p
o
r
a
t
o
r
F
a
n
m
o
t
o
r
s
a
r
e
0
.
7
t
o
3
.
5
A
/
C
Amps (460 VAC). The circuit tests outside this range.
• UNIT CONTROL: Engine and standby operation: pre--trip will fail and display “PRE--TRIP FAIL AND
COMPLETED”.
• RESET CONDITION: Auto Reset if pre--trip mode 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) 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 pre--trip Stop pre--trip during Test #3 by holding = Key for 6
seconds
d. Review active alarm list for Alarm 146 If alarm is present, follow steps 2 thru 4. If alarm is not
present, follow Steps 5 thru 10.
2. Check 1EVCON
a. Inspect heater contactor coil and wire
connections
No damage to coil
No damaged or corroded pins
b. Check contactor coil resistance Refer to Section 2.14
12
3. Check 1EVCON Amp Draw
VDC
CIR-
CUIT
a. Check 2HTCON1 amp draw Use Component Test Mode (Section 5.2) to test.
Refer to Section 2.14 for amp values. View current draw in
Data List.
4. Check 1EVCON Wiring
a. Inspect harness & control box
connector pins & terminals (See wiring
schematic)
See Notes 2 & 6
No physical damage to harness.
No damaged or corroded pins