Electric Heat Kit Installation Manual

4.3 Enabling Electric Heat
PVFY
-A·NAMU-E(1) models:
When installing the Electric Heat Kit on PVFY-A·NAMU-E models, Switch 3-4 on the control board inside the Multi-Position
Air Handler must be “ON”. When installing the Electric Heat Kit on PVFY-A·NAMU-E1 models, Switch 3-2 on the control
board inside the Multi-Position Air Handler must be “ON”. This activates the electric heat option.
SW 3-4
ON
OFF
For PVFY-A·NAMU-E models ONLY
SW 3-2
ON
OFF
For PVFY-A·NAMU-E1 models ONLY
The Electric Heat Lock-out control for PVFY-A·NAMU-E(1) models is set by the outdoor unit. SW5-10 – ON, will Enable the
electric heat lockout. The electric heat lockout will prevent the electric heat from energizing above a set ambient
temperature. The factory setting is 32° F with SW5-10 in the “ON” position. The temperatures can be adjusted by the
Maintenance T
ool to change what ambient temperature the electric heat is locked out. The following table shows the
default values for the Electric Heat Lockout.
Conditions to send the enabling signal for heater for PVFY
**Disabled/Enabled can be changed by Dip Switch setting on Outdoor Unit (Factory Setting: Disabled)
These set temperatures can be changed by the Maintenance Tool
Heater Control by
Outdoor Air Temp.
Disabled
SW 5-10 OFF
Enabled
SW 5-10 ON
-18F
-15F
Only Electric Heater with
Warning*
Heat Pump & Electric Heat
*Warning: Error Code #3121 (Out of range outside air temperature) will be shown on the Remote Controller
(Stage #1)
Only Heat Pump
(Stage #2)
Heat Pump & Electric Heat
(Stage #3)
(Stage #4)
Only Electric Heater with
Warning*
-18F
-15F
-4F
32F
50F
68F
Temperatures shown are sensed from
TH7 at the Outdoor Unit
Electric Heat Kit
Specifications are subject to change without notice. 14 © 2018 Mitsubishi Electric US, Inc.