AERCO Innovation (G-13-1854 and above) - Manual (Page 117)

Innovation Water Heaters Installation, Operation & Maintenance Manual
CHAPTER 9 – WATER HEATER MANAGEMENT
OMM-0078_0J
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Page 117 of
196
GF-128
Phone: 800-526-0288
PRI: 11/22/2013
WHM Programming & Start-Up Procedure - Continued
25. Scroll to the WHM Auto Timer option will appear. This option is used to select the elapsed
time interval between failure of the WHM Master and switch-over to a new WHM Master
(default = 30 seconds). If desired, this time interval can be changed to any value within
the allowable range of 10 to 120 seconds. To alter this setting, press the CHANGE key
and enter the desired time interval. Press the ENTER key to store the new setting.
26. The WHM Auto Mstr and WHM Auto Timer options will be automatically “pushed” to the
WHM Slaves on the network.
27. This completes all programming for the WHM.
9.8 TROUBLESHOOTING
Faults which may occur during WHM operation include the items listed in Table 9-2.
Table 9-2. WHM Troubleshooting
FAULT INDICATION PROBABLE CAUSE CORRECTIVE ACTION
OUTLET TEMPERATURE
display is flashing on 2
C- More Control Panels 1. Two C-Mores have their
WHM Mode menu option
set to WHM Master
1. Check the WHM Mode entries in
the units which have their displays
flashing. Change one of the WHM
Mode settings to WHM Slave.
REMOTE LED on one or
more WHM units is Off. 1. Improperly connected or
faulty RS485 Modbus
wiring.
2. Improper Comm address.
3. Unit Comm address is
not unique.
1. Check the polarity of the RS485
Comm connections on the I/O
board of the affected unit. Also,
ensure that all Modbus wiring
connections to the unit are secure.
2. Verify that the address of the
affected unit is within the allowable
range (1 thru 8).
3. Check to ensure that none of the
units have the same Comm
address.
Actuator-controlled
sequencing valve does not
open 1. Control cable not
connected to valve
actuator.
2. 24 VAC power not being
supplied to valve
actuator.
3. Defective valve actuator.
1. Ensure that the control cable from
the unit’s I/O Box is connected to
the valve actuator.
2. Remove the enclosure cover from
the valve actuator and verify that 24
VAC is present at Terminal 2 of the
actuator.
3. Replace valve actuator. Following
replacement, the actuator stroke
will have to be calibrated to ensure
it fully opening and closing.