7
9. Troubleshooting the error codes:
SureStart
Feature:
The VT2218 is programmed with an automatic unblocking feature. In the case of a locked rotor condition, it will
attempt to unblock the rotor with a series of rapid oscillating actions. It will repeat this process up to 100 times. If still locked after
100 attempts, “LOCKED ROTOR” will apppear on the LCD. See error code listing below.
Listed below are potential diagnostic error codes which will appear on the LCD display in case of a malfunction.
Testing the Sensors
A good quality test meter capable of measuring up to 5,000 k
Ω
(1 k
Ω
= 1000
Ω
) is required to measure the sensor resistance. In
addition to this, the actual temperature must be measured with a good quality digital thermometer.
First measure the temperature using the thermometer and then measure the resistance of the sensor at the VT2218. The wires from
the sensor must not be connected to the circulator while this test is performed. The wiring terminals are easily removed by pulling
them from the circulator. Using the chart below, estimate the temperature measured by the sensor. The sensor and thermometer
readings should be close. If the test meter reads a very high resistance, there may be a broken wire, a poor wiring connection or a
defective sensor. If the resistance is very low, the wiring may be shorted, there may be moisture in the sensor or the sensor may be
defective. To test for a defective sensor, measure the resistance directly at the sensor location.
ERROR CODE*
DESCRIPTION
CORRECTIVE ACTION
SENSOR 1 MISSING
Supply sensor disconnected.
Reconnect sensor.
SENSOR 2 MISSING
Return sensor disconnected.
Reconnect sensor.
SENSOR 1 SHORTED
Bad sensor.
Replace sensor.
SENSOR 2 SHORTED
Bad sensor.
Replace sensor.
AC INPUT UNDER VOLTAGE Low voltage problem.
Check power supply.
AC INPUT OVER VOLTAGE
High voltage problem.
Check power supply.
LOCKED ROTOR
Probable locked rotor or motor failure.
Replace pump.
MOTOR OVER CURRENT
Possible locked rotor or motor over current.
Replace pump.
OVER TEMPERATURE
PC Board overheating.
Pump will reduce current and speed until PCB
temperature is acceptable. If speed falls below
1650 RPM, pump will stop on safety. Cycle AC
power OFF/ON to restart.
SPEED
TACO
GRUNDFOS
WILO
B & G/XYLEM
ARMSTRONG
1
003
Alpha-15-55 (1)
-
-
-
2
006
Alpha-15-55 (2)
-
-
Compass (1)
3
007
008
0015-1
0015-2
UP-15-42
UPS-15-58 (1)
UPS-15-58 (2)
Star S-2 (1)
Star S-21 (2)
NRF-25 (1)
NRF-25 (2)
Astro 230 (1)
Astro 230 (2)
Compass (2)
4
0015-3
UPS-15-58 (3)
Alpha-15-55 (3)
Star S-21 (3)
NRF-25 (3)
Eco-Vario
Astro 230 (3)
Compass (3)
Pump Cross Reference (Constant Speed Mode):
Temperature
Resistance
Temperature
Resistance
Temperature
Resistance
Temperature
Resistance
°F
°C
Ω
°F
°C
Ω
°F
°C
Ω
°F
°C
Ω
-30
-34
234,196
30
-1
34,558
90
32
7,334
150
66
2,045
-20
-29
165,180
40
4
26,099
100
38
5,828
160
71
1,689
-10
-23
118,018
50
10
19,900
110
43
4,665
170
77
1,403
0
-18
85,362
60
16
15,311
120
49
3,760
180
82
1,172
10
-12
62,465
70
21
11,883
130
54
3,050
190
88
983
20
-7
46,218
80
27
9,299
140
60
2,490
200
93
829
MODE
TACO
GRUNDFOS
WILO
B & G/XYLEM
ARMSTRONG
Delta-T
008-VDT
Alpha 15-55
Stratos Eco 16FX
Eco-Auto 19-14
Compass 2020
Pump Cross Reference (Delta-T Mode):
*
Flashing Displayed on LCD
