Qnergy PowerGen 5650 Series, Installation & Operation Manual, Page: 132 / 194

F
AULT
M
ESSAGES
, P
OWER
G
EN
120
2017 Internal circulating pump is
blocked
Pump feedback signal is 90%
suggesting too much flow
resistance, pump motor is
blocked, Bad pump.
• Loosen blocked pump, If
serial number is below
PG260 and has a gold
color coolant in it, flush
out coolant with Preston
AF2000 Cor-Guard
Anti-freeze 50/50 for
standard PowerGen and
60/40
• If ambient temperature is
below -5°F, verify coolant
is 60/40 mix and that
pump heater operated
during the cold start
(applicable for LTS
systems only).
• Drain coolant, Remove
pump motor by
unscrewing 4x M6
screws, verify the
impeller can freely spin.
reassemble.
• Replace pump motor.
2022 Engine Bay temperature too
high
Temperature measured at the
top portion of the engine bay
exceeding 176°F/80°C.
Inspect Burner flexible seal
and all exhaust ducting.
2023 CAN bus error Noise on the CANBUS line, bad
CANBUS wiring
Table 15-3 PowerGen Error Messages, User Clearable
Fault Code Description Possible Causes