Basic Trouble Shooting
MANUAL - ES700B
Rev November 2019
Copyright © 2019 Equipment Source Inc.
Page 25 of 30
12V cooling fan failed
(Fan fails to engage when the
enclosure temperature is over
70F [20C])
If control panel is functioning, check 30A breaker on the engine
control panel.
If the engine control panel fails to start, see “Engine controller
fails”
Check fan thermostat circuit
The fan should draw approximately 17-20A if operating
correctly.
Check/replace the three 40A Bosch style relays in the engine
control panel. All three relays must be working for the fan to
operate.
Replace fan