Watlow Power Series Rev H User Manual
Page 59
190 r/w
(0-4)*
Insure that the source of communications to the unit is communicating
without long interruptions. Verify the integrity of the communications
signals from the controlling device. Return to the factory for repair.
Yes
No
No
189 r/w
(0-4)*
Lower line voltage or damage to the unit may occur. If line voltage is
appropriate, check line voltage calibration.
See individual alarms below for recommendations.
180 r
See
individual
alarms
below.
See
individual
alarms
below.
Shut-
down
Auto
Recovery
Corrective Action
No
Check wiring connections from load terminal to heater and heater
return. Replace heater if necessary.
No
Check wiring connections from load terminal to heater and heater
return.
Verify adequate wire size.
Replace heater if necessary.
No
Provide more cabinet ventilation or cooling. Check the fan; if faulty,
return to the factory for repair. Check to see that the heat sink is
clean. If necessary increase heat sink over temperature value if it is
below factory safety shutdown temperature. Return to factory for
SCR voltage drop and thermistor evaluation.
Yes if
[ph2t]
Yes
Insure that the line voltage is the same for each phase. If line
voltages are the same, check line voltages calibrations.
Yes if
[ldif]
Yes
Address load balance on heaters. If loads are balanced, check cali-
bration of current.
No
Check the power supply line frequency. Power Series will not operate
reliably outside 47 to 63 Hz. specification.
No
Check for major line voltage fluctuations. If line voltage does not
fluctuate, check line voltage calibration.
Yes
Yes
Check the line for high noise level and check wiring connections.
Possible line sense circuitry error, return to factory for repair.
Check [fcty] -> [diag] for [l!a1], [l@a1], or [l#a1], to determine
the type and location of the line loss.
[uUoL] can be caused by line voltage < one-half baseline voltage.
[a|Cr] can be caused by noisy line supplies.
[n|Cr] can be caused by a missing line.
[`pOl] can be caused by a line half cycle or a missing line.
[freq] can be caused by noisy line supplies.
[HCYC] only active with heater diagnostics installed and indicates a half
cycle loss detected in the load; can be caused by SCR non-conduction.
Modbus Number
181 r/w
(0-4)*
182 r/w (2)
(0-4)*
183 r/w (4)
(0-4)*
184 r/w (8)
(0-4)*
185 r/w
(0-4)*
186 r/w
(0-4)*
187 r/w
(0-4)*
188 r/w
(0-4)*
Appendix
Watlow Power Series
I
A.5
*
Inactive - 0, Active - 1, Latched Active - 2, Latched Inactive - 3, Unlatched - 4