Transformers - Henny Penny LVG-102 Technical Manual

7-12. TRANSFORMERS

June 2010
These components drop the line voltage to low voltage compo-
nents such as, control board, AIF board and gas valves.
Checkout:
1. Perform Power Section troubleshooting, paragraph 1-3.
To avoid electrical shock or property damage, move
power switch to OFF and disconnect main circuit
breaker, or unplug cord at wall receptacle.
2. Loosen the screw securing the top of the control panel.
3. Pivot the top of the panel down, allowing panel to be
supported by 2 brackets in the slots in control shroud.
To avoid electrical shock, use care when checking
transformer. Following checks are performed with
wall circuit breaker closed and main power switch
in the ON position.
4. Remove 3 pin connector (P2) from back of control panel.
5. Set multi-meter to AC volts. With power ON, take voltage
reading on 2 outside pins. Voltage should be 120VAC-
Dom. or 230VAC-Int'l. If no voltage, perform step 1.
6. Reconnect 3 pin connector to the back of control panel.
7. With power ON and 5 pin connector (P1) still connected,
insert meter probes into back of P1 at positions 4 and 5.
Voltage should be 120VAC-Dom. or 230VAC-Int'l.
8. With power ON and P1 still connected, insert probes into
back of P1 at positions 1 and 2. Voltage should be 24VAC.
9. If proper voltage is present at positions 4 & 5 of P1 and no
voltage at positions 1 and 2, replace the transformer.
10. If proper voltage is present at positions 1, 2, 4, & 5 of P1
and control panel has no display, unplug each connector
from control panel, inspect pins and wire connections,
repair as needed, and firmly plug each connector into panel.
7-15
Model LVG-102, 103, 104