Mira FORM User Manual

27
FAULT DIAGNOSIS
Symptom
Cause/Rectification
Normal function of thermostatic control when operating
conditions are unsatisfactory;
a. Check strainers and inlet/outlet fittings for flow restriction.
b.Make sure that minimum flow rate is sufficient for supply
conditions.
c. Make sure that dynamic inlet pressures are nominally balanced
and sufficient.
d.Make sure that inlet temperature differentials are sufficient.
e. (Subsequent to rectification of supply conditions) Check
thermostatic performance; renew thermostatic cartridge, if
necessary.
2. Fluctuating
or reduced
flow rate.
3. No flow from
shower
control
outlet.
4. Blend
temperature
drift.
Indicates operating conditions changed.
a. Refer to symptom 2. above.
b. Hot supply temperature fluctuation.
c. Supply pressure fluctuation.
a. Check strainers and inlet/outlet fittings for blockage.
b. Hot or cold supply failure; thermostat holding correct shutdown
function: rectify, and refer to symptom 2.e. above.
c. Flow control cartridge faulty. Check and renew if necessary.
a. Inlet supplies are reversed (refer to section: ‘Installation,
Reversed Inlet Supplies’. Check.
b. No hot water reaching shower control. Check.
c. Check strainers and inlet/outlet fittings for blockage.
d. Refer to symptom 5 below.
e. Installation conditions continuously outside operating
parameters: refer to section: ‘Specifications’, and 2e below.
1. Only hot or
cold water
from outlet.
5. Hot water in
cold supply
or vice
versa.
Indicates checkvalves require maintenance, refer to section:
‘Maintenance’.
6. Maximum
blend
temperature
setting too
hot or too
cool.
a. Indicates incorrect maximum temperature setting; refer to
section: ‘Commissioning’.
b. As symptom 4. above.
c. As symptom 5. above.

Mira FORM Specifications

General

Brand	Mira
Model	FORM
Category	Plumbing Product
Language	English