Bosch CL Series User Manual

Troubleshooting
19.2 Option Card Troubleshooting
Table 17 Option Card Troubleshooting
Option Card Troubleshooting
Problem Mode Check Then Action Additional Action
No Hot Gas Reheat
operation
Cooling/Hot
Gas Reheat
Is the H_OUT LED on
the Option Card
ON?
If Yes, check the
Hot Gas Reheat
Valve.
1. Ensure there is
24VAC bet
ween
“H_OUT” and “C.”
2. Ensure the solenoid
is worki
ng.
If action1 is true and
action 2 i
s not, then
replace the Hot Gas
Reheat Valve.
If No, check if there
is 24VAC b
etween
“H_OUT” and “C”
on the Option
Card.
If there is 24VAC, then
replace the Option
Card.
No Economizer
operation
Cooling
Is the E_OUT LED on
the Option Card
ON?
If Yes, ensure the
Cool Setpoint in
the Option Card is
set above the
water
temperature.
If true, check the
Economizer Valve.
Replace the Economizer
Valve as needed.
No Boilerless Control
operation
Heating
Is the W_OUT LED
on the Option Card
ON?
If Yes, ensure the
Heat Setpoint in
the Option Card is
set above the
water
temperature.
If true and the unit is
equipped with electric
heat, then check the
electric heat
operation.
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CL Series Heat Pumps — 8733838716 (2024/05)

Bosch CL Series Specifications

General

Brand	Bosch
Model	CL Series
Category	Heat Pump
Language	English